Electrical field-driven ripening profiles of colloidal suspensions

作     者：Zi-Rui Wang Wei-Jia Wen Li-Yu Liu 王子瑞;温维佳;刘雳宇

作者机构：College of Physics Chongqing University Chongqing 401331 China Department of Physics The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong 999077 China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2018年第27卷第6期

页      面：496-501页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11474345 and 11674043) 

主　　题：electrorheological fluid electrical field coarsening structure 

摘      要：Electrorheological（ER） fluid is a type of smart fluid whose shear yield stress relies on the external electrical field strength. The transition of ER fluid microstructure driven by the electrical field is the reason why viscosity ***, the transparent electrodes are used to investigate the column size distribution where an external electric field is applied to a colloidal suspension, i.e., ER fluid is increased. The coarsening profile of ER suspensions is strongly related to electrical field strength, but it is insensitive to particle size. In addition, in a low field range the shear stress corresponding to the mean column diameter is studied and they are found to satisfy a power law. However, this dependence is invalid when the field strength surpasses a threshold value.