Knudsen Layer Behaviour and Momentum Accommodation from Surface Roughness Modelling

Autor: Matthew M. Kratzer, Suresh K. Bhatia, Alexander Y. Klimenko
Rok vydání: 2023
Předmět:
Zdroj: Journal of Statistical Physics. 190
ISSN: 1572-9613
0022-4715
DOI: 10.1007/s10955-023-03075-w
Popis: This work analyses the formation of the Knudsen layer in micro/nanoscale flows by linking a rough wall collision model to a continuum flow model via asymptotic matching. Expressions for the accommodation coefficients in terms of the surface characteristics are derived, allowing for boundary layer analysis of rarefied flows without the use of prior determined accommodation coefficients. This derived model, through use of the Lennard–Jones parameters for a nanoscale system, allows for a prediction of the the effective Tangential Momentum Accommodation Coefficient (TMAC) in flows against ordered nanoscale surfaces.
Databáze: OpenAIRE
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