粒径比率对声波操纵颗粒分离过程影响的数值模拟研究  

Numerical Simulation cf the Influence of Particle Size Ratio on Acoustic-manipulated Particle Separation

作　　者：吴悠[1] 田晓平[1] KENZA Ayyada 王璜鹏 杨文婧[2] WU You;TIAN Xiaoping;KENZA Ayada;WANG Huangpeng;YANG Wenjing(Chinese Flight Test Establishment,Xi'an 710089,China;Northwestern Polytechnical University National Key Laboratory of Solid Rocket Propulsion,Xi'an 710072,China)

机构地区：[1]中国飞行试验研究院,陕西西安710089 [2]西北工业大学固体推进全国重点实验室,陕西西安710072

出　　处：《电声技术》2024年第4期23-27,共5页Audio Engineering

摘　　要：基于驻波表面声波的微粒操纵技术因其高效低耗而得到广泛应用,但仅依靠实验方法和理论研究难以全面研究微观尺度下的微粒运动。对微流体内声波分离微观颗粒的过程进行数值模拟,并进一步研究不同粒径颗粒的粒径比率对颗粒分离过程的影响。结果表明,两种颗粒的粒径越接近,颗粒分离越困难;粒径差越大,颗粒分离效果越好;粒径比率影响颗粒分离过程的本质是影响了大小颗粒受声场作用力间的差距。The particle manipulation technology based on standing wave surface acoustic waves has been widely applied due to its high efficiency and low consumption,but relying solely on experimental methods and theoretical research is difficult to comprehensively study particle motion at the microscopic scale.A numerical simulation was conducted on the process of acoustic separation of micro particles in microfluidics,and the influence of particle size ratios of different particle sizes on the particle separation process was further studied.The results indicate that the closer the particle sizes of the two types of particles are,the more difficult it is to separate them.The larger the particle size difference,the better the particle separation effect.The essence of the particle size ratio affecting the particle separation process is that it affects the difference between the sound field forces acting on small and large particles.

关 键 词：颗粒分离 离散元 表面声波 微流体 

分 类 号：TN912.34[电子电信—通信与信息系统]