Time-dependent fluid squeeze-out between solids with rough surfaces
IFF, FZ Jülich, D-52425, Jülich, Germany
2 IFAS, RWTH Aachen University, D-52074, Aachen, Germany
* e-mail: firstname.lastname@example.org
Accepted: 22 June 2010
Published online: 28 July 2010
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. As an application we discuss fluid squeeze-out between a tire tread block and a road surface. Some implications for the leakage of seals are discussed, and experimental results are presented to test the theory. The theoretical prediction for the leak rate as a function of the fluid pressure difference is in good agreement with the experimental data for all fluid pressures up to “lift-off”, where the fluid pressure equals the nominal rubber-substrate squeezing pressure.
© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2010