Given the significant impact of an external electric field on fluidized bed hydrodynamics and the practical importance of rodlike particles, this study examines the behavior of a fluidized bed containing rodlike particles under various external electric fields. Simulations were performed using a coupled computational fluid dynamics-discrete element method, and rodlike particles were generated using a multisphere approach aided by quaternions. The effect of different vertical and horizontal external electric fields on the orientation of particles was investigated. Also, the effect of particle size on their orientation in the presence of constant vertical and horizontal external electric fields was explored in this work. The results showed that increasing the electric field strength and reducing the size of rodlike particles lead to an increment in the tendency of particles to become oriented along the direction of the electric field. Moreover, the effect of the external electric field at various inlet gas velocities on the probability distribution of the porosity in the bed was studied. Finally, the effect of vertical and horizontal electric fields on the bubble diameter was examined. This study offers a deeper understanding of the fluidization of rodlike particles in the presence of an electric field, and its findings can be applied to design and optimize related processes.

中文翻译：

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使用 CFD-DEM 的外部电场对杆状颗粒流态化的影响


鉴于外部电场对流化床流体动力学的重大影响以及棒状颗粒的实际重要性，本研究研究了包含棒状颗粒的流化床在各种外部电场下的行为。使用耦合计算流体动力学-离散元方法进行模拟，并使用四元数辅助的多球体方法生成杆状粒子。研究了不同垂直和水平外电场对粒子取向的影响。此外，在这项工作中，还探讨了在恒定的垂直和水平外部电场存在下颗粒大小对其取向的影响。结果表明，增加电场强度和减小棒状粒子的尺寸会导致粒子沿电场方向定向的趋势增加。此外，还研究了不同入口气体速度下外部电场对床层孔隙率概率分布的影响。最后，研究了垂直和水平电场对气泡直径的影响。这项研究对棒状颗粒在电场存在下的流化提供了更深入的理解，其发现可以应用于设计和优化相关过程。