Measurement of variation of momentum accommodation coefficients with molecular mass and structure

Document Type

Article

Publication Date

1-1-2019

Abstract

Adisk spindown experiment allows measurement of tangentialmomentumaccommodation coefficients of different gases and material combinations in a consistent manner. Aluminum is tested for a range of gases, including monoatomic, diatomic, and triatomic gases. The results confirm previous experimental results that show a reduction in tangential momentum accommodation coefficients with increasing molecular masses of gases. In addition, the results reveal a previously unreported phenomenon: That the tangential momentumaccommodation coefficient is also a function of the molecular structure of gases.

Publication Source (Journal or Book title)

Journal of Thermophysics and Heat Transfer

First Page

773

Last Page

778

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