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Consistent Boundary Conditions for Multicomponent Real Gas Mixtures Based on Characteristic Waves

Okong'o, Nora and Bellan, Josette (2002) Consistent Boundary Conditions for Multicomponent Real Gas Mixtures Based on Characteristic Waves. Journal of Computational Physics, 176 (2). pp. 330-344. ISSN 0021-9991. doi:10.1006/jcph.2002.6990.

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Previously developed characteristic-wave-based boundary conditions for multicomponent perfect gas mixtures are here extended to real gas mixtures. The characteristic boundary conditions are derived from the one-dimensional wave decomposition of the Euler equations, and the wave amplitude variations are determined from the prescribed boundary conditions on the flow variables. The viscous conditions are applied separately. For multidimensional simulations, the boundary conditions for each coordinate direction are applied additively. These boundary conditions are tested on a representative two-dimensional problem—the propagation of an incompressible vortex by a supersonic flow with outflow conditions specified as nonreflecting—solved using a high-order finite-difference scheme. Simulations conducted for a heptane–nitrogen mixture flow with strong real gas effects display excellent, nonreflective wave behavior as the vortex leaves the computational domain, verifying the suitability of this method for the multidimensional multicomponent real gas flows computed.

Item Type:Article
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URLURL TypeDescription
Bellan, Josette0000-0001-9218-7017
Additional Information:© 2002 Elsevier Science (USA). Received 4 September 2001, Available online 25 March 2002. This study was conducted at the Jet Propulsion Laboratory (JPL) and sponsored jointly by the Air Force Office of Scientific Research under the direction of Dr. Julian Tishkoff and by the Army Research Office under the direction of Dr. David Mann under an interagency agreement with the National Aeronautics and Space Administration. The authors thank Dr. Kenneth Harstad of JPL for helpful discussions on real gas thermodynamics. The computational resources were provided by the JPL Supercomputing Center.
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Army Research Office (ARO)UNSPECIFIED
Subject Keywords:partial differential equations; fluid mechanics; classical thermodynamics; heat transfer
Issue or Number:2
Record Number:CaltechAUTHORS:20171019-105455457
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Official Citation:Nora Okong'o, Josette Bellan, Consistent Boundary Conditions for Multicomponent Real Gas Mixtures Based on Characteristic Waves, In Journal of Computational Physics, Volume 176, Issue 2, 2002, Pages 330-344, ISSN 0021-9991, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:82493
Deposited By: Tony Diaz
Deposited On:19 Oct 2017 18:02
Last Modified:15 Nov 2021 19:50

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