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Updated: May 16, 2026

The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids
Published on: September 30, 2014
Role of surface charge on boundary slip in fluid flow
1Nanoprobe Laboratory for Bio- & Nanotechnology and Biomimetics (NLB(2)), The Ohio State University, 201 W. 19th Avenue, Columbus, OH 43210-1142, USA; School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, PR China.
Abstract:
For a smooth hydrophobic surface, slip occurs during fluid flow close to the boundary, known as boundary slip which can reduce fluid drag. The surface charge present at the interface is believed to affect the boundary slip. In this paper, the effect of surface charge on the fluid flow on a hydrophobic surface is studied in both deionized (DI) water and saline. Positive and negative voltages are applied to the substrate to vary the surface charge density. The electrostatic force and slip lengths are measured with different applied electric field. Results are the subject of the paper.
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