Fluid squeeze-out between rough surfaces: comparison of theory with experiment

Details Fluid squeeze-out between rough surfaces: comparison of theory with experiment Fluid squeeze-out between rough surfaces: comparison of theory with experiment

2011-02-07

arxiv.org/abs/1102.1355v1

Physics

Condensed Matter

Soft Condensed Matter

8 pages, 13 figures

Scientific paper

We study the time dependency of the (average) interfacial separation between an elastic solid with a flat surface and a rigid solid with a randomly rough surface, squeezed together in a fluid. We use an analytical theory describing the fluid flow factors, based on the Persson contact mechanics theory and the Bruggeman effective medium theory, to calculate the removal of the fluid from the contacting interface of the two solids. In order to test this approach, we have performed simple squeeze-out experiments. The experimental results are compared to the theory predictions.

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