Temperature jump and slip velocity calculations from an anisotropic scattering kernel

S. Kokou Dadzie and J. Gilbert Méolans

Physica A: Statistical Mechanics and its Applications, 2005, vol. 358, issue 2, 328-346

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.

Keywords: Gas-wall interaction; Boltzmann equation; Temperature jump; Slip velocity; Slip flows (search for similar items in EconPapers)
Date: 2005
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:358:y:2005:i:2:p:328-346

DOI: 10.1016/j.physa.2005.04.013

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