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Internal structure of shock waves in disparate mass mixturesThe detailed flow structure of a normal shock wave for a gas mixture is investigated using the direct-simulation Monte Carlo method. A variable diameter hard-sphere (VDHS) model is employed to investigate the effect of different viscosity temperature exponents (VTE) for each species in a gas mixture. Special attention is paid to the irregular behavior in the density profiles which was previously observed in a helium-xenon experiment. It is shown that the VTE can have substantial effects in the prediction of the structure of shock waves. The variable hard-sphere model of Bird shows good agreement, but with some limitations, with the experimental data if a common VTE is chosen properly for each case. The VDHS model shows better agreement with the experimental data without adjusting the VTE. The irregular behavior of the light-gas component in shock waves of disparate mass mixtures is observed not only in the density profile, but also in the parallel temperature profile. The strength of the shock wave, the type of molecular interactions, and the mole fraction of heavy species have substantial effects on the existence and structure of the irregularities.
Document ID
19920045571
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chung, Chan-Hong
(NASA Lewis Research Center Cleveland, OH, United States)
De Witt, Kenneth J.
(NASA Lewis Research Center Cleveland, OH, United States)
Jeng, Duen-Ren
(Toledo, University OH, United States)
Penko, Paul F.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
AIAA PAPER 92-0496
Accession Number
92A28195
Funding Number(s)
CONTRACT_GRANT: NCC3-171
Distribution Limits
Public
Copyright
Other

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