This study investigated the hydrodynamics of highly viscous liquid under vertical acoustic vibration, and examined the effects of vibration parameters and filling ratio on the strain rate, stretching index, and convective intensity of high‐viscosity liquid. A numerical simulation model of gas–liquid flows was developed using computational fluid dynamics method and validated through experiment. Under acoustic vibration, the high‐viscosity liquid predominantly experienced extensional and shearing flows. Significant deformation of the high‐viscosity liquid was observed near the interface between gas and liquid. Increasing the amplitude or frequency of acoustic vibration, selecting a combination of low‐frequency and high amplitude under equal acceleration conditions, as well as appropriately reducing the filling ratio can enhance the stretching and shearing effects on the liquid, and improve the strength of convection. The findings also established a predictive relationship between amplitude and frequency, enabling the determination of optimal mixing conditions.

中文翻译：

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垂直声振作用下高粘性液体流体动力学的数值研究


本研究研究了垂直声振作用下高黏性液体的流体动力学，研究了振动参数和填充比对高黏度液体应变速率、拉伸指数和对流强度的影响。采用计算流体动力学方法建立了气液流动数值模拟模型，并通过实验验证。在声振作用下，高粘度液体主要经历拉伸流和剪切流。在气体和液体之间的界面附近观察到高粘度液体的显着变形。增加声振的振幅或频率，在等加速度条件下选择低频和高振幅的组合，以及适当降低填充比，可以增强对液体的拉伸和剪切作用，提高对流强度。研究结果还建立了振幅和频率之间的预测关系，从而能够确定最佳混合条件。