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Temperature jump and slip velocity calculations from an anisotropic scattering kernel

Author

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  • Dadzie, S. Kokou
  • Méolans, J. Gilbert

Abstract

This article deals with the problem of temperature jump and slip velocity at the wall in gas/surface interaction. A consistent modelling of an impermeable surface involving an anisotropic scattering kernel developed in previous works is used to establish boundary conditions in unstructured molecule gas flows. Thus, a temperature jump relation is derived in which the gas viscous effects at the wall and the mean velocity gradients appear. Likewise, a slip velocity relation is obtained in which both the slip coefficient and the thermal creep coefficient depend on the wall-to-gas temperature ratio. Moreover, both the temperature jump and the slip velocity relations involve not only one accommodation coefficient as usual, but also the gas/surface information through the various (notably normal and tangential) accommodation coefficients of the momentum components.

Suggested Citation

  • Dadzie, S. Kokou & Méolans, J. Gilbert, 2005. "Temperature jump and slip velocity calculations from an anisotropic scattering kernel," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 358(2), pages 328-346.
    • Handle: RePEc:eee:phsmap:v:358:y:2005:i:2:p:328-346
    DOI: 10.1016/j.physa.2005.04.013
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