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Analysis of reflection of wave propagation in magneto-thermoelastic nonlocal micropolar orthotropic medium at impedance boundary Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-07-22 Anand Kumar Yadav, Hari Shankar Mahato, Sangeeta Kumari, Pawel Jurczak
Purpose This study aims to examine the plane wave reflection problem in micropolar orthotropic magneto-thermoelastic half space, considering the influence of impedance as a boundary in a nonlocal elasticity. Design/methodology/approach This study presents the novel formulation of governing partial differential equations for micropolar orthotropic medium with impact of nonlocal thermo-elasticity under
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Impact of activation energy and cross-diffusion effects on 3D convective rotating nanoliquid flow in a non-Darcy porous medium Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-07-16 Sivasankaran Sivanandam, Turki J. Alqurashi, Hashim M. Alshehri
Purpose This study aims to investigate numerically the impact of the three-dimensional convective nanoliquid flow on a rotating frame embedded in the non-Darcy porous medium in the presence of activation energy. The cross-diffusion effects, i.e. Soret and Dufour effects, and heat generation are included in the study. The convective heating condition is applied on the bounding surface. Design/methodology/approach
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MHD conjugate mixed convection along with internal heat generation and Joule heating in a closed/open cavity with rotating solid cylinder Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-07-16 Nahid Hasan, Sumon Saha
Purpose This study aims to investigate magnetohydrodynamic (MHD) conjugate pure mixed convection considering interior heat production and resistive heating inside a square closed/open cavity featuring a rotating cylinder for aiding (clockwise) and opposing (counterclockwise) flow configurations. Moreover, the impacts of altering cylinder size and conductivity on the system’s overall performance to
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Convective heat transfer with Hall current using magnetized non-Newtonian Carreau fluid model on the cilia-attenuated flow Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-07-16 Fehid Ishtiaq, R. Ellahi, M.M. Bhatti, Sadiq M. Sait
Purpose Cilia serves numerous biological functions in the human body. Malfunctioning of nonmotile or motile cilia will have different kinds of consequences for human health. More specifically, the directed and rhythmic beat of motile cilia facilitates the unidirectional flow of fluids that are crucial in both homeostasis and the development of ciliated tissues. In cilia-dependent hydrodynamic flows
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Non-Fourier computations of heat and mass transport in nanoscale solid-fluid interactions using the Galerkin finite element method Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-07-12 Abdulaziz Alsenafi, Fares Alazemi, M. Nawaz
Purpose To improve the thermal performance of base fluid, nanoparticles of three types are dispersed in the base fluid. A novel theory of non-Fourier heat transfer is used for design and development of models. The thermal performance of sample fluids is compared to determine which types of combination of nanoparticles are the best for an optimized enhancement in thermal performance of fluids. This
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Physics-informed neural networks (P INNs): application categories, trends and impact Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-07-10 Mohammad Ghalambaz, Mikhail A. Sheremet, Mohammed Arshad Khan, Zehba Raizah, Jana Shafi
Purpose This study aims to explore the evolving field of physics-informed neural networks (PINNs) through an analysis of 996 records retrieved from the Web of Science (WoS) database from 2019 to 2022. Design/methodology/approach WoS database was analyzed for PINNs using an inhouse python code. The author’s collaborations, most contributing institutes, countries and journals were identified. The trends
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Numerical simulation of natural convection in a differentially heated cubical cavity with solid fins Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-07-10 Xuan Hoang Khoa Le, Hakan F. Öztop, Mikhail A. Sheremet
Purpose The performance of solid fins inside a differentially heated cubical cavity is numerically studied in this paper. The main purpose of the study is to make an optimization to reach the maximum heat transfer in the enclosure having the solid fins with studied parameters. Design/methodology/approach The considered domain of interest is a differentially heated cube having heat-conducting solid
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A computational predictive model for nanozyme diffusion dynamics: optimizing nanosystem performance Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-07-09 Maryam Fatima, Ayesha Sohail, Youming Lei, Sadiq M. Sait, R. Ellahi
Purpose Enzymes play a pivotal role in orchestrating essential biochemical processes and influencing various cellular activities in tissue. This paper aims to provide the process of enzyme diffusion within the tissue matrix and enhance the nano system performance by means of the effectiveness of enzymatic functions. The diffusion phenomena are also documented, providing chemical insights into the complex
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An artificial intelligence approach for the estimation of conduction heat transfer using deep neural networks Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-07-01 Mohammad Edalatifar, Jana Shafi, Majdi Khalid, Manuel Baro, Mikhail A. Sheremet, Mohammad Ghalambaz
Purpose This study aims to use deep neural networks (DNNs) to learn the conduction heat transfer physics and estimate temperature distribution images in a physical domain without using any physical model or mathematical governing equation. Design/methodology/approach Two novel DNNs capable of learning the conduction heat transfer physics were defined. The first DNN (U-Net autoencoder residual network
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Conjugate heat transfer analysis of developing region of square ducts for isothermal and isoflux boundary conditions Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-07-02 Chithra V.P., Balaji Bakthavatchalam, Jayakumar J.S., Khairul Habib, Sambhaji Kashinath Kusekar
Purpose This paper aims to present a comprehensive analysis of conjugate heat transfer phenomena occurring within the developing region of square ducts under both isothermal and isoflux boundary conditions. The study involves a rigorous numerical investigation, using advanced computational methods to simulate the complex heat exchange interactions between solid structures and surrounding fluid flows
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Predicting heat transfer rate and system entropy based on combining artificial neural network with numerical simulation Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-06-28 Hillal M. Elshehabey
Purpose The purpose of this paper is to present numerical simulations for magnetohydrodynamics natural convection of a nanofluid flow inside a cavity with an H-shaped obstacle based on combining artificial neural network (ANN) with the finite element method (FEM), and predict the heat transfer rate and system entropy. Design/methodology/approach The enclosure is assumed to be inclined. Changing the
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Effect of catalyst distribution in the combustion catalytic layer on heat and mass transport characteristics of the microchannel reactor Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-06-28 Weiqiang Kong, Qiuwan Shen, Naibao Huang, Min Yan, Shian Li
Purpose The purpose of this study is to investigate the effect of catalyst distribution in the combustion catalytic layer on heat and mass transport characteristics of the auto-thermal methanol steam reforming microchannel reactor. Design/methodology/approach Computational fluid dynamics (CFD) method is used to study four different gradient designs. The corresponding distributions of temperature, species
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Prediction of the minimum fluidization velocity of different biomass types by artificial neural networks and empirical correlations Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-06-26 Thenysson Matos, Maisa Tonon Bitti Perazzini, Hugo Perazzini
Purpose This paper aims to analyze the performance of artificial neural networks with filling methods in predicting the minimum fluidization velocity of different biomass types for bioenergy applications. Design/methodology/approach An extensive literature review was performed to create an efficient database for training purposes. The database consisted of experimental values of the minimum fluidization
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Efficient modeling of liquid splashing via graph neural networks with adaptive filter and aggregator fusion Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-06-26 Jinyao Nan, Pingfa Feng, Jie Xu, Feng Feng
Purpose The purpose of this study is to advance the computational modeling of liquid splashing dynamics, while balancing simulation accuracy and computational efficiency, a duality often compromised in high-fidelity fluid dynamics simulations. Design/methodology/approach This study introduces the fluid efficient graph neural network simulator (FEGNS), an innovative framework that integrates an adaptive
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Optimisation of MHD flow within trapezoidal cavity containing hybrid nanofluid by artificial neural network Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-06-18 Arooj Tanveer, Sami Ul Haq, Muhammad Bilal Ashraf, Muhammad Usman Ashraf, R. Nawaz
Purpose This study aims to numerically investigate heat transport in a trapezoidal cavity using hybrid nanoparticles (Ag-$Al_2O_3$). Unlike previous studies, this one covers magnetohydrodynamics, joule heating with viscous dissipation, heat absorption and generation. The left and right sides of the chasm are frigid. The upper wall heats, whereas the bottom wall remains adiabatic. Design/methodology/approach
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Effects of vibration on natural convection in a square inclined porous enclosure filled with Cu-water nanofluid Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-06-13 Hamza Sayyou, Jabrane Belabid, Hakan F. Öztop, Karam Allali
Purpose The purpose of this paper is to investigate the effects of gravitational modulation on natural convection in a square inclined porous cavity filled by a fluid containing copper nanoparticles. Design/methodology/approach The present study uses a system of equations that couple hydrodynamics to heat transfer, representing the governing equations of fluid flow in a square domain. The Boussinesq–Darcy
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Turbo-RANS: straightforward and efficient Bayesian optimization of turbulence model coefficients Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-06-13 Ryley McConkey, Nikhila Kalia, Eugene Yee, Fue-Sang Lien
Purpose Industrial simulations of turbulent flows often rely on Reynolds-averaged Navier-Stokes (RANS) turbulence models, which contain numerous closure coefficients that need to be calibrated. This paper aims to address this issue by proposing a semi-automated calibration of these coefficients using a new framework (referred to as turbo-RANS) based on Bayesian optimization. Design/methodology/approach
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Honeycomb-configured dissipative nanofluid flow within a squeezed channel with entropy generation: regression and numerical evaluations Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-06-05 Syed Modassir Hussain, Rohit Sharma, Manoj Kumar Mishra, Jitendra Kumar Singh
Purpose Nanosized honeycomb-configured materials are used in modern technology, thermal science and chemical engineering due to their high ultra thermic relevance. This study aims to scrutinize the heat transmission features of magnetohydrodynamic (MHD) honeycomb-structured graphene nanofluid flow within two squeezed parallel plates under Joule dissipation and solar thermal radiation impacts. Desi
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AI based optimal analysis of electro-osmotic peristaltic motion of non-Newtonian fluid with chemical reaction using artificial neural networks and response surface methodology Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-06-04 Ahmed Zeeshan, Zaheer Asghar, Amad ur Rehaman
Purpose The present work is devoted to investigating the sensitivity analysis of the electroosmotic peristaltic motion of non-Newtonian Casson fluid with the effect of the chemical reaction and magnetohydrodynamics through the porous medium. The main focus is on flow efficiency quantities such as pressure rise per wavelength, frictional forces on the upper wall and frictional forces on the lower wall
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A modified Green-Naghdi fractional order model for analyzing thermoelectric MHD Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-05-31 Mohamed M. Hendy, Magdy A. Ezzat
Purpose Whereas, the classical Green-Naghdi Type II (GN-II) model struggles to accurately represent the thermo-mechanical behavior of thermoelectric MHD due to its inability to account for the memory effect. A new mathematical model of the GN-II theory incorporates a fractional order of heat transport to address this issue. Design/methodology/approach The employment of the matrix exponential method
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A neural based modeling approach for predicting effective thermal conductivity of brewer’s spent grain Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-05-31 Amanda de Oliveira e Silva, Alice Leonel, Maisa Tonon Bitti Perazzini, Hugo Perazzini
Purpose Brewer's spent grain (BSG) is the main by-product of the brewing industry, holding significant potential for biomass applications. The purpose of this paper was to determine the effective thermal conductivity (keff) of BSG and to develop an Artificial Neural Network (ANN) to predict keff, since this property is fundamental in the design and optimization of the thermochemical conversion processes
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Investigating embedded data distribution strategy on reconstruction accuracy of flow field around the crosswind-affected train based on physics-informed neural networks Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-05-28 Guang-Zhi Zeng, Zheng-Wei Chen, Yi-Qing Ni, En-Ze Rui
Purpose Physics-informed neural networks (PINNs) have become a new tendency in flow simulation, because of their self-advantage of integrating both physical and monitored information of fields in solving the Navier–Stokes equation and its variants. In view of the strengths of PINN, this study aims to investigate the impact of spatially embedded data distribution on the flow field results around the
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Phase transition of multiple encapsulated PCMs in a U-shaped channel under MHD with ternary nanofluid Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-05-21 Fatih Selimefendigil, Hakan F. Oztop
Purpose Multiple encapsulated phase change materials (PCMs) are used in a wide range of applications, including convective drying, electronic cooling, waste heat recovery and air conditioning. Therefore, it is important to understand the performance of multiple PCMs in channels with flow separation and develop methods to increase their effectiveness. The aim of the study is to analyze the phase transition
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On the extension of a Riemann solver for RANS simulations Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-05-16 Axel Buck, Christian Mundt
Purpose Reynolds-averaged Navier–Stokes (RANS) models often perform poorly in shock/turbulence interaction regions, resulting in excessive wall heat load and incorrect representation of the separation length in shockwave/turbulent boundary layer interactions. The authors suggest that this can be traced back to inadequate numerical treatment of the inviscid fluxes. The purpose of this study is an extension
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Entropy generation analysis of microrotating Casson’s nanofluid with Darcy–Forchheimer porous media using a neural computing based on Levenberg–Marquardt algorithm Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-05-10 Manjeet Kumar, Pradeep Kaswan, Manjeet Kumari
Purpose The purpose of this paper is to showcase the utilization of the magnetohydrodynamics-microrotating Casson’s nanofluid flow model (MHD-MRCNFM) in examining the impact of an inclined magnetic field within a porous medium on a nonlinear stretching plate. This investigation is conducted by using neural networking techniques, specifically using neural networks-backpropagated with the Levenberg–Marquardt
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Unsteady slip flow of special second-grade fluid induced by Fe3O4 particles past a movable sheet with magnetic and nonlinear heat source/sink Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-05-09 Umair Khan, Aurang Zaib, Anuar Ishak, El-Sayed M. Sherif, Piotr Wróblewski
Purpose Ferrofluids are aqueous or non-aqueous solutions with colloidal particles of iron oxide nanoparticles with high magnetic characteristics. Their magnetic characteristics enable them to be controlled and manipulated when ferrofluids are exposed to magnetic fields. This study aims to inspect the features of unsteady stagnation point flow (SPF) and heat flux from the surface by incorporating ferromagnetic
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The simulation of droplet impact on liquid film evaporation in horizontal falling film evaporator based on smoothed particle hydrodynamics Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-05-08 Mengyao Fan, Xiaojing Ma, Lin Li, Xinpeng Xiao, Can Cheng
Purpose In this paper, the complex flow evaporation process of droplet impact on the liquid film in a horizontal falling film evaporator is numerically studied based on smoothed particle hydrodynamics (SPH) method. The purpose of this paper is to present the mechanism of the water treatment problem of the falling film evaporation for the high salinity mine water in Xinjiang region of China. Design
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Nanofluid natural convection of hot concentric cylinder in oval-shaped porous cavity at different eccentricity Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-04-30 Farooq H. Ali, Mushtaq F. Almensoury, Atheer Saad Hashim, Qusay Rasheed Al-Amir, Hameed K. Hamzah, M. Hatami
Purpose This paper aims to study the effect of concentric hot circular cylinder inside egg-cavity porous-copper nanofluid on natural convection phenomena. Design/methodology/approach The finite element method–based Galerkin approach is applied to solve numerically the set of governing equations with appropriate boundary conditions. Findings The effects of different range parameters, such as Darcy number
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Shear and normal stresses of electroosmotic magnetized physiological nanofluid on curved artery with moderate Reynolds number: application on electroshock therapy Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-04-30 Reima Daher Alsemiry, Rabea E. Abo Elkhair, Taghreed H. Alarabi, Sana Abdulkream Alharbi, Reem Allogmany, Essam M. Elsaid
Purpose Studying the shear stress and pressure resulting on the walls of blood vessels, especially during high-pressure cases, which may lead to the explosion or rupture of these vessels, can also lead to the death of many patients. Therefore, it was necessary to try to control the shear and normal stresses on these veins through nanoparticles in the presence of some external forces, such as exposure
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A physics-driven and machine learning-based digital twinning approach to transient thermal systems Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-04-30 Armando Di Meglio, Nicola Massarotti, Perumal Nithiarasu
Purpose In this study, the authors propose a novel digital twinning approach specifically designed for controlling transient thermal systems. The purpose of this study is to harness the combined power of deep learning (DL) and physics-based methods (PBM) to create an active virtual replica of the physical system. Design/methodology/approach To achieve this goal, we introduce a deep neural network (DNN)
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Irreversibility analysis of Darcy-Forchheimer flow of a Williamson hybrid nanofluids near a stagnation-point across a vertical plate with buoyancy force Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-04-16 Latifah Falah Alharbi, Umair Khan, Aurang Zaib, Anuar Ishak
Purpose A novel type of heat transfer fluid known as hybrid nanofluids is used to improve the efficiency of heat exchangers. It is observed from literature evidence that hybrid nanofluids outperform single nanofluids in terms of thermal performance. This study aims to address the stagnation point flow induced by Williamson hybrid nanofluids across a vertical plate. This fluid is drenched under the
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Permeability estimation for deformable porous media with convolutional neural network Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-04-16 Kunpeng Shi, Guodong Jin, Weichao Yan, Huilin Xing
Purpose Accurately evaluating fluid flow behaviors and determining permeability for deforming porous media is time-consuming and remains challenging. This paper aims to propose a novel machine-learning method for the rapid estimation of permeability of porous media at different deformation stages constrained by hydro-mechanical coupling analysis. Design/methodology/approach A convolutional neural network
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Extended (3 + 1)-dimensional Kairat-II and Kairat-X equations: Painlevé integrability, multiple soliton solutions, lump solutions, and breather wave solutions Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-04-09 Abdul-Majid Wazwaz
Purpose This study aims to investigate two newly developed (3 + 1)-dimensional Kairat-II and Kairat-X equations that illustrate relations with the differential geometry of curves and equivalence aspects. Design/methodology/approach The Painlevé analysis confirms the complete integrability of both Kairat-II and Kairat-X equations. Findings This study explores multiple soliton solutions for the two examined
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Constraint-based analysis of heat transport and irreversibility in magnetic nanofluidic thermal systems Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-04-03 Nirmal K. Manna, Abhinav Saha, Nirmalendu Biswas, Koushik Ghosh
Purpose This paper aims to investigate the thermal performance of equivalent square and circular thermal systems and compare the heat transport and irreversibility of magnetohydrodynamic (MHD) nanofluid flow within these systems. Design/methodology/approach The research uses a constraint-based approach to analyze the impact of geometric shapes on heat transfer and irreversibility. Two equivalent systems
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Solid–liquid phase transition simulated by the lattice Boltzmann model: from pore scale to representative elementary volume scale Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-04-04 Dong Li, Yu Zhou, Zhan-Wei Cao, Xin Chen, Jia-Peng Dai
Purpose This paper aims to establish a lattice Boltzmann (LB) method for solid-liquid phase transition (SLPT) from the pore scale to the representative elementary volume (REV) scale. By applying this method, detailed information about heat transfer and phase change processes within the pores can be obtained, while also enabling the calculation of larger-scale SLPT problems, such as shell-and-tube phase
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Linear stability analysis of MHD mixed convection flow of a radiating nanofluid in porous channel in presence of viscous dissipation Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-04-05 Cédric Gervais Njingang Ketchate, Oluwole Daniel Makinde, Pascalin Tiam Kapen, Didier Fokwa
Purpose This paper aims to investigate the hydrodynamic instability properties of a mixed convection flow of nanofluid in a porous channel. Design/methodology/approach The treated single-phase nanofluid is a suspension consisting of water as the working fluid and alumina as a nanoparticle. The anisotropy of the porous medium and the effects of the inclination of the magnetic field are highlighted.
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Thermal-hydraulic performance of turbulent flows across a heated round tube installed through several perforated twisted tapes Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-04-03 Shiang-Wuu Perng, Horng Wen Wu, De-An Huang
Purpose The purpose of this study is to advance turbulent thermal convection inside the constant heat-flux round tube inserted by multiple perforated twisted tapes. Design/methodology/approach The novel design of this study is accomplished by inserting several twisted tapes and drilling some circular perforations near the tape edge (C1, C3, C5: solid tapes; C2, C4, C6: perforated tapes). The turbulence
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Numerical investigation on thermal protection of wind turbine flanges in extremely cold weather Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-04-02 Chenyu Zhang, Hongtao Xu, Yaodong Da
Purpose Thermal protection of a flange is critical for preventing tower icing and collapse of wind turbines (WTs) in extremely cold weather. This study aims to develop a novel thermal protection system for the WTs flanges using an electrical heat-tracing element. Design/methodology/approach A three-dimensional model and the Poly-Hexacore mesh structure are used, and the fluid-solid coupling method
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Deep learning algorithms for temperature prediction in two-phase immersion-cooled data centres Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-03-29 Pratheek Suresh, Balaji Chakravarthy
Purpose As data centres grow in size and complexity, traditional air-cooling methods are becoming less effective and more expensive. Immersion cooling, where servers are submerged in a dielectric fluid, has emerged as a promising alternative. Ensuring reliable operations in data centre applications requires the development of an effective control framework for immersion cooling systems, which necessitates
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An impact of ternary nanofluid on a micropolar fluid with inclined MHD, slip flow and heat transfer Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-03-26 U.S. Mahabaleshwar, Mahesh Rudraiah, Huang Huang, Bengt Ake Sunden
Purpose The purpose of this study is to analyze the impact of inclined magnetohydrodynamics (MHD) and thermal radiation on the flow of a ternary micropolar nanofluid on a sheet that is expanding and contracting while applying mass transpiration and velocity slip conditions to the flow. The nanofluid, which is composed of Au, Ag and Cu nanoparticles dispersed in water as the base fluid, possesses critical
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Investigation of magneto-convection characteristics in a sudden expanding channel with convex surface geometry under thermally developing flow conditions Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-03-25 Emrehan Gürsoy, Hayati Kadir Pazarlioğlu, Mehmet Gürdal, Engin Gedik, Kamil Arslan, Abdullah Dağdeviren
Purpose The purpose of this study is to analyse the magnetic field effect on Fe3O4/H2O Ferrofluid flowing in a sudden expansion tube, which has specific behaviour in terms of rheology, with convex dimple fins. Because the investigation of flow separation is a prominent application in performance, the effect of magnetic field and convex dimple on the thermo-hydraulic performance of sudden expansion
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Effect of hot air inclined jet impingement to container for controlling of energy storage of PCM: experimental and numerical investigation Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-03-20 Hakan F. Oztop, Burak Kiyak, Ishak Gökhan Aksoy
Purpose This study aims to focus on understanding how different jet angles and Reynolds numbers influence the phase change materials’ (PCMs) melting process and their capacity to store energy. This approach is intended to offer novel insights into enhancing thermal energy storage systems, particularly for applications where heat transfer efficiency and energy storage are critical. Design/methodology/approach
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Swirl-induced motion prediction with physics-guided machine learning utilizing spatiotemporal flow field structure Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-03-20 Ziming Zhou, Fengnian Zhao, David Hung
Purpose Higher energy conversion efficiency of internal combustion engine can be achieved with optimal control of unsteady in-cylinder flow fields inside a direct-injection (DI) engine. However, it remains a daunting task to predict the nonlinear and transient in-cylinder flow motion because they are highly complex which change both in space and time. Recently, machine learning methods have demonstrated
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Heat transfer analysis of magnetohydrodynamics peristaltic fluid with inhomogeneous solid particles and variable thermal conductivity through curved passageway Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-03-12 Atifa Kanwal, Ambreen A. Khan, Sadiq M. Sait, R. Ellahi
Purpose The particle distribution in a fluid is mostly not homogeneous. The inhomogeneous dispersion of solid particles affects the velocity profile as well as the heat transfer of fluid. This study aims to highlight the effects of varying density of particles in a fluid. The fluid flows through a wavy curved passage under an applied magnetic field. Heat transfer is discussed with variable thermal
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Impact of memory-dependent heat transfer on Rayleigh waves propagation in nonlocal piezo-thermo-elastic medium with voids Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-03-11 Vipin Gupta, Barak M.S., Soumik Das
Purpose This paper addresses a significant research gap in the study of Rayleigh surface wave propagation within a piezoelectric medium characterized by piezoelectric properties, thermal effects and voids. Previous research has often overlooked the crucial aspects related to voids. This study aims to provide analytical solutions for Rayleigh waves propagating through a medium consisting of a nonlocal
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Simulation of phase change during the freezing of unsaturated porous media by using a coupled lattice Boltzmann model Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-03-07 Fei Xu, Zheng Wang, Wei Hu, Caihao Yang, Xiaolong Li, Yaning Zhang, Bingxi Li, Gongnan Xie
Purpose The purpose of this paper is to develop a coupled lattice Boltzmann model for the simulation of the freezing process in unsaturated porous media. Design/methodology/approach In the developed model, the porous structure with complexity and disorder was generated by using a stochastic growth method, and then the Shan-Chen multiphase model and enthalpy-based phase change model were coupled by
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Adjoined ISPH method and artificial intelligence for thermal radiation on double diffusion inside a porous L-shaped cavity with fins Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-03-04 Hillal M. Elshehabey, Andaç Batur Çolak, Abdelraheem Aly
Purpose The purpose of this study is to adapt the incompressible smoothed particle hydrodynamics (ISPH) method with artificial intelligence to manage the physical problem of double diffusion inside a porous L-shaped cavity including two fins. Design/methodology/approach The ISPH method solves the nondimensional governing equations of a physical model. The ISPH simulations are attained at different
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Research on precise and standardized numerical simulation strategy for vehicle aerodynamics Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-02-29 Zhen Chen, Jing Liu, Chao Ma, Huawei Wu, Zhi Li
Purpose The purpose of this study is to propose a precise and standardized strategy for numerically simulating vehicle aerodynamics. Design/methodology/approach Error sources in computational fluid dynamics were analyzed. Additionally, controllable experiential and discretization errors, which significantly influence the calculated results, are expounded upon. Considering the airflow mechanism around
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Numerical investigation of three-dimensional natural convection heat transfer on corrugated plates of variable height Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-02-28 Sílvio Aparecido Verdério Júnior, Pedro J. Coelho, Vicente Luiz Scalon
Purpose The purpose of this study is to numerically investigate the geometric influence of different corrugation profiles (rectangular, trapezoidal and triangular) of varying heights on the flow and the natural convection heat transfer process over isothermal plates. Design/methodology/approach This work is an extension and finalization of previous studies of the leading author. The numerical methodology
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Thermal performance improvement in wavy microchannels using secondary channels Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-02-27 Karthikeyan Paramanandam, Venkatachalapathy S, Balamurugan Srinivasan, Nanda Kishore P V R
Purpose This study aims to minimize the pressure drop across wavy microchannels using secondary branches without compromising its capacity to transfer the heat. The impact of secondary flows on the pressure drop and heat transfer capabilities at different Reynolds numbers are investigated numerically for different wavy microchannels. Finally, different channels are evaluated using performance evaluation
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Aerodynamic performance increase over an A320 morphing wing in transonic regime by numerical simulation at high Reynolds number Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-02-27 Jacques Abou Khalil, César Jiménez Navarro, Rami El Jeaid, Abderahmane Marouf, Rajaa El Akoury, Yannick Hoarau, Jean-François Rouchon, Marianna Braza
Purpose This study aims to investigate the morphing concepts able to manipulate the dynamics of the downstream unsteadiness in the separated shear layers and, in the wake, be able to modify the upstream shock–boundary layer interaction (SBLI) around an A320 morphing prototype to control these instabilities, with emphasis to the attenuation or even suppression of the transonic buffet. The modification
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Analysis of open channel flow with various layered vegetation using CFD, considering different near-wall treatment methods Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-02-20 Rahim Şibil
Purpose The purpose of this paper is to investigate the impact of near-wall treatment approaches, which are crucial parameters in predicting the flow characteristics of open channels, and the influence of different vegetation covers in different layers. Design/methodology/approach Ansys Fluent, a computational fluid dynamics software, was used to calculate the flow and turbulence characteristics using
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Comparative analysis of entropy generation and heat transfer in a tilted partially heated square enclosure using the finite difference method Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-02-20 Ebrahem A. Algehyne
Purpose In recent times, there has been a growing interest in buoyancy-induced heat transfer within confined enclosures due to its frequent occurrence in heat transfer processes across diverse engineering disciplines, including electronic cooling, solar technologies, nuclear reactor systems, heat exchangers and energy storage systems. Moreover, the reduction of entropy generation holds significant
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A new exploration on passive control of transonic flow over a backward-facing step Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-02-19 Xiang Shen, Kai Zeng, Liming Yang, Chengyong Zhu, Laurent Dala
Purpose This paper aims to study passive control techniques for transonic flow over a backward-facing step (BFS) using square-lobed trailing edges. The study investigates the efficacy of upward and downward lobe patterns, different lobe widths and deflection angles on flow separation, aiming for a deeper understanding of the flow physics behind the passive flow control system. Design/methodology/approach
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Entropy generation in a partially heated hybrid nanofluid saturated wavy porous cavity Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-02-05 Prabir Barman, Srinivasa Rao Pentyala, B.V. Rathish Kumar
Purpose A porous cavity flow field generates entropy owing to energy and momentum exchange within the fluid and at solid barriers. The heat transport and viscosity effects on fluid and solid walls irreversibly generate entropy. This numerical study aims to investigate convective heat transfer together with entropy generation in a partially heated wavy porous cavity filled with a hybrid nanofluid.
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Numerical modelling and experimental validation of dripping, jetting and whipping modes of gas dynamic virtual nozzle Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-02-05 Krištof Kovačič, Jurij Gregorc, Božidar Šarler
Purpose This study aims to develop an experimentally validated three-dimensional numerical model for predicting different flow patterns produced with a gas dynamic virtual nozzle (GDVN). Design/methodology/approach The physical model is posed in the mixture formulation and copes with the unsteady, incompressible, isothermal, Newtonian, low turbulent two-phase flow. The computational fluid dynamics
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Entropy generation for thermo-magnetic fractional order convective flow in complex porous enclosures: a numerical study Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-02-02 Deepika Parmar, S.V.S.S.N.V.G. Krishna Murthy, B.V. Rathish Kumar, Sumant Kumar
Purpose This study aims to analyze the impact of fractional derivatives on heat transfer and entropy generation during transient free convection inside various complex porous enclosures, such as triangle, L-shape and square-containing wavy surfaces. These porous enclosures are saturated with Cu-water nanofluid and subjected to the influence of a uniform magnetic field. Design/methodology/approach In
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A Hamiltonian equation produces a variety of Painlevé integrable equations: solutions of distinct physical structures Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-01-30 Abdul-Majid Wazwaz
Purpose The purpose of this paper is to investigate a variety of Painlevé integrable equations derived from a Hamiltonian equation. Design/methodology/approach The newly developed Painlevé integrable equations have been handled by using Hirota’s direct method. The authors obtain multiple soliton solutions and other kinds of solutions for these six models. Findings The developed Hamiltonian models exhibit
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Scaling and modeling of the heat transfer across the free surface of a thermocapillary liquid bridge Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-01-29 Francesco Romanò, Mario Stojanović, Hendrik C. Kuhlmann
Purpose This paper aims to derive a reduced-order model for the heat transfer across the interface between a millimetric thermocapillary liquid bridge from silicone oil and the surrounding ambient gas. Design/methodology/approach Numerical solutions for the two-fluid model are computed covering a wide parametric space, making a total of 2,800 numerical flow simulations. Based on the computed data,
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Effects of velocity, thermal and concentration slips on the entropy generation of nanofluid over an inclined sheet Int. J. Numer. Methods Heat Fluid Flow (IF 4.0) Pub Date : 2024-01-29 Ashok K. Barik, Swetapadma Rout, Jnana Ranjan Senapati, M.M. Awad
Purpose This paper aims at studying numerically the entropy generation of nanofluid flowing over an inclined sheet in the presence of external magnetic field, heat source/sink, chemical reaction along with slip boundary conditions imposed on an impermeable wall. Design/methodology/approach A suitable similarity transformation technique has been used to convert the coupled nonlinear partial differential