Dynamics simulation of electrorheological suspensions in poiseuille flow field  

作　　者：朱石沙 罗成 周杰 陈娜 

机构地区：[1]College of Mechanical Engineer,Xiangtan University [2]Changshu Institute of Technology

出　　处：《Journal of Central South University》2008年第S1期234-238,共5页中南大学学报（英文版）

基　　金：Project (50771089) supported by the National Natural Science Foundation of China

摘　　要：Based on a modified Maxwell-Wagner model,molecular dynamics is carried out to simulate the structural changes of ER(electrorheological) suspensions in a poiseuille flow field.The simulation results show that the flow assists in the collection of particles at the electrodes under a low pressure gradient,and the negative ER effect will show under a high pressure gradient.By analyzing the relationship curves of the shear stress and the pressure gradient in different relaxation time,it is found that for the same kind of ER suspensions materials,there is an optimal dielectric relaxation frequency.Based on a modified Maxwell-Wagner model, molecular dynamics is carried out to simulate the structural changes of ER (electrorheological) suspensions in a poiseuille flow field. The simulation results show that the flow assists in the collection of particles at the electrodes under a low pressure gradient, and the negative ER effect will show under a high pressure gradient. By analyzing the relationship curves of the shear stress and the pressure gradient in different relaxation time, it is found that for the same kind of ER suspensions materials, there is an optimal dielectric relaxation frequency.

关 键 词：ELECTRORHEOLOGICAL SUSPENSIONS molecular dynamics pressure GRADIENT VALUE RELAXATION time. 

分 类 号：O37[理学—流体力学]