A disk spindown experiment allows measurement of tangential momentum accommodation 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 momentum accommodation coefficient is also a function of the molecular structure of gases.
Measurement of Variation of Momentum Accommodation Coefficients with Molecular Mass and Structure
Journal of Thermophysics and Heat Transfer ; 33 , 3 ; 773-778
2019-01-31
6 pages
Article (Journal)
Electronic Resource
English