Mixing Characteristics and Parameter Effects on the Mixing Efficiency of High-Viscosity Solid–Liquid Mixtures under High-Intensity Acoustic Vibration
Mixing Characteristics and Parameter Effects on the Mixing Efficiency of High-Viscosity Solid–Liquid Mixtures under High-Intensity Acoustic Vibration
复制标题
DOI：
10.3390/pr11082367
复制
发表时间：
2023-08
期刊：
影响因子：
3.5
通讯作者：
Xiaobin Zhan;Lei Yu;Yalong Jiang;Qiankun Jiang;Tielin Shi
中科院分区：
文献类型：
--
作者：
Xiaobin Zhan;Lei Yu;Yalong Jiang;Qiankun Jiang;Tielin Shi
高强度声振是解决高粘性物料均匀分散问题的一种新技术。本文研究了高粘度固液两相在高强度声振动作用下的混合特性，探讨了振动参数对混合效率的影响。采用流体体积模型（VOF）和离散相模型（DERM）建立了固液气多相流的数值模拟模型，并通过实验验证了模型的正确性。结果表明，在声振动作用下，整个场中气液表面的运动和变形对于实现固液两相快速均匀混合至关重要。增大振动的振幅或频率，可以加剧气液自由表面的运动和变形，提高混合效率，缩短混合时间。在等加速度条件下，低频高幅时物料的混合效率较高。此外，我们定义了一个关系，预测理想的混合条件作为振幅和频率的函数。在选择操作参数时，这可作为评估最低要求的宝贵参考指南。
High-intensity acoustic vibration is a new technology for solving the problem of uniform dispersion of highly viscous materials. In this study, we investigate the mixing characteristics of high-viscosity solid–liquid phases under high-intensity acoustic vibration and explore the effect of vibration parameters on the mixing efficiency. A numerical simulation model of solid–liquid–gas multiphase flow, employing the volume of fluid (VOF) and discrete phase model (DPM), was developed and subsequently validated through experimental verification. The results show that the movement and deformation of the gas–liquid surface over the entire field are critical for achieving rapid and uniform mixing of the solid–liquid phases under acoustic vibration. Increasing the amplitude or frequency of vibration can intensify the movement and deformation of the free surface of gas and liquid, improve the mixing efficiency, and shorten the mixing time. Under the condition of constant acceleration, the mixing efficiency of materials is higher at low frequency and high amplitude. Further, we define a relationship that predicts desirable mixing conditions as a function of amplitude and frequency. This serves as a valuable reference guide for evaluating the minimum requirements when selecting operating parameters.