Spatial Cross-Correlated Diffusion of Colloids under Shear Flow

• Impact Factor:4.331
• DOI number:10.1021/acs.langmuir.8b01803
• Journal:Langmuir (JCR Q2 Top)
• Abstract:The spatial cross-correlated diffusion of colloidal particles is often used as an essential tool to study the dynamic properties of a fluid because it directly describes the hydrodynamic interaction between two particles in a fluid. However, the experimental measurement of cross-correlated diffusion can be substantially modified by even a weak shear flow. In this work, the effect of a shear flow on spatial cross-correlated diffusion is demonstrated using experimental measurements that show a clear dependence on pair angles. An analytical solution is proposed to explain the experimental observations. A numerical simulation is performed to systemically demonstrate the influence of shear flow on spatial cross-correlated diffusion. The results of the experiment, theoretical analysis, and numerical simulation agree well with each other. Therefore, this research provides a sensitive experimental method to determine the weak shear flow in any quasi-two-dimensional fluid systems.
• First Author:Na Li
• Co-author:Wei Zhang,Zehui Jiang,Wei Chen
• Volume:34
• Issue:36
• Page Number:10537-10542
• Translation or Not:no
• Date of Publication:2018-09-11
• Included Journals:SCI