Effect of Curvature of Tip and Convexity of Electrode on Localization of Particles

作     者：Sudarshan Ghonge D. Nagendra Prasad Swarnim Narayan Hains Francis Astha Sethi Subimal Deb Souri Banerjee 

作者机构：Department of Physics Birla Institute Technology and Science-Pilani Hyderabad Campus Hyderabad India Department of Physics and Frederick Seitz Materials Research Laboratory University of Illinois Urbana-Champaign IL USA Department of Physics GIT GITAM University Visakhapatnam India 

出 版 物：《Open Journal of Fluid Dynamics》 (流体动力学（英文）)

年 卷 期：2015年第5卷第4期

页      面：295-301页

学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学] 

主　　题：Finite Element Method Transport Dynamics AC Electroosmosis Dielectrophoresis Vortex 

摘      要：We investigate the effect of curvature of the tip and the convexity of an electrode on the localization of suspended particles under the combined effect of dielectrophoresis and AC electroosmosis through simulations using COMSOL Multiphysics. A systematic analysis of the parameters defining the convexity of the electrode—the radius of the tip and the apex angle shows that suspended particles can be trapped closely to the electrode edges for comparatively larger tip radii and apex angles. This in turn should favour the trapping of polarizable molecules between the electrodes only if the fluid velocities at the vortices are not very strong.