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Journal Articles Physical Review E : Statistical, Nonlinear, and Soft Matter Physics Year : 2012

Hydrodynamic drag-force measurement and slip length on microstructured surfaces

Abstract

In this paper, a drainage experiment of water between a borosilicate sphere and a microstructured surface constituted by regularly spaced pillars is presented. The microstructured surface has two parts: on one part the liquid forms a Cassie interface and on the second it forms a Wenzel interface. The measured hydrodynamic drag force is larger on the Cassie part compared to the Wenzel part. Furthermore, for the Cassie part, from the hydrodynamic drag force measurements on a pillar and between pillars the corresponding local slip lengths have been extracted. The area average slip length on the surface is in agreement with the value expected by Philip's equation.
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Dates and versions

hal-00716058 , version 1 (30-08-2018)

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Abdelhamid Maali, Y. Pan, Bharat Bhushan, E. Charlaix. Hydrodynamic drag-force measurement and slip length on microstructured surfaces. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2012, 85 (6), pp.066310 (1-5). ⟨10.1103/PhysRevE.85.066310⟩. ⟨hal-00716058⟩
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