细颗粒物的声凝并数值模拟研究进展

Progress and prospect in numerical simulation on acoustic agglomeration of fine particles

采用数值模拟方法研究细颗粒物的声凝并具有实验研究无法比拟的灵活性和经济性,是获得声凝并微观机理和宏观效果的重要途径之一。本文对国内外相关研究进展和现状进行评述,介绍了细颗粒物声凝并的同向作用机理、流体力学作用机理、声致湍流机理,阐述了声凝并数值模拟的区域算法、矩量法、蒙特卡罗方法,指出考虑各凝并机理之间的耦合,利用多重蒙特卡罗方法结合可视化编程技术,对声凝并过程进行可视化数值模拟是声凝并数值模拟研究的重要发展方向。

Compared with experimental investigation,numerical simulation has overwhelming advantages in its flexibility and economical efficiency,therefore it becomes an important method to obtain the microscopic mechanisms and the macroscopic effects of fine particle agglomeration subjected to an acoustic field.The relevant study progress and present status were reviewed.The orthokinetic,hydrodynamic and acoustic streaming mechanisms of acoustic agglomeration were introduced,and the numerical simulation methods for acoustic agglomeration such as sectional algorithm,method of moments,and Monte Carlo method,were also presented.It is proposed that based on the coupling of acoustic agglomeration mechanisms,visualization simulation using Multi-Monte Carlo method combined with visual programming technique can be an important development direction for the simulation of acoustic agglomeration.