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Time-dependent fluid squeeze-out between solids with rough surfaces

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Abstract.

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.

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Authors and Affiliations

  1. IFF, FZ Jülich, D-52425, Jülich, Germany

    B. Lorenz & B. N. J. Persson

  2. IFAS, RWTH Aachen University, D-52074, Aachen, Germany

    B. Lorenz

Authors
  1. B. Lorenz
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  2. B. N. J. Persson
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Correspondence to B. N. J. Persson.

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Lorenz, B., Persson, B.N.J. Time-dependent fluid squeeze-out between solids with rough surfaces. Eur. Phys. J. E 32, 281–290 (2010). https://doi.org/10.1140/epje/i2010-10625-0

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  • DOI: https://doi.org/10.1140/epje/i2010-10625-0

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