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Discrete-velocity collision dynamics for polyatomic molecules

Goldstein, David B. (1992) Discrete-velocity collision dynamics for polyatomic molecules. Physics of Fluids A, 4 (8). pp. 1831-1839. ISSN 0899-8213. doi:10.1063/1.858404.

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A multispeed discrete‐velocity molecular model of a rarefied gas is developed which permits quantitatively accurate simulation of mixtures of molecules of different mass which have both translational and internal rotational energies. In particular, the molecules are represented as having three discrete velocity components and a single discrete internal energy that does not directly affect the translational motion. During binary collisions, rotational and translational kinetic energies are exchanged according to a phenomenological model. Results are presented for the thermal relaxation to equilibrium of mixtures of H_2 and Ne, N_2 and O_2, and N_2 and CO_2. Good agreement is found with the corresponding continuous‐velocity results.

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Additional Information:© 1992 American Institute of Physics. (Received 26 November 1991; accepted 30 March 1992) Suggestions and support from Professor Bradford Sturtevant at Caltech are greatly appreciated. Part of this work was completed at the Center for Non-Linear Studies at Los Alamos National Lab, documented in Report No. LA-UR 90-3243. Part of the computation was done at the Pittsburgh Supercomputer Center. The work presented here was also in part supported by the Office of Naval Research under Award No. N00014-91-J-1588.
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Office of Naval Research (ONR)N00014-91-J-1588
Issue or Number:8
Record Number:CaltechAUTHORS:20170408-155701042
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:76096
Deposited By: 1Science Import
Deposited On:12 Jun 2017 22:27
Last Modified:15 Nov 2021 16:57

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