Density Distribution Measurements in Rarefied Gases Contained Between Parallel Plates At High Temperature Differences
Abstract
Density distributions were experimentally determined in rarefied gases at rest contained between two parallel plates maintained at widely different temperatures. The temperatures of the hot and cold plates were ∼79°K and ∼294°K, respectively, resulting in a temperature ratio of about 4:1. Both helium and nitrogen were used as test gases. Particular attention was focused on obtaining data in the temperature jump and transition regimes. The gas densities were measured by observing the luminescence produced by a high-energy electron beam traversed between the plates. In addition to the density measurements, heat transfer measurements were also made in order to estimate the values of the thermal accommodation coefficients. The experimental results for helium were compared with the analytical results of Liu and Lees, and good agreement was found between the theory and data near the cold plate. Near the hot plate the analytical results and the data differed by about 7%.
Recommended Citation
D. J. Alofs et al., "Density Distribution Measurements in Rarefied Gases Contained Between Parallel Plates At High Temperature Differences," Physics of Fluids, American Institute of Physics (AIP), Jan 1971.
The definitive version is available at https://doi.org/10.1063/1.1693466
Department(s)
Mechanical and Aerospace Engineering
International Standard Serial Number (ISSN)
1070-6631
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 1971 American Institute of Physics (AIP), All rights reserved.
Publication Date
01 Jan 1971
