Modular implementation of a hybrid DSMC-NS algorithm for hypersonic non-equilibrium flows

Thomas E. Schwartzentruber, Leonardo C. Scalabrin, Iain D. Boyd

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Scopus citations

Abstract

The implementation of a modular particle-continuum (MPC) numerical method is presented which solves the Navier-Stokes (NS) equations in regions of near-equilibrium and uses the direct simulation Monte Carlo (DSMC) method where the flow is in non-equilibrium. A mesh refinement procedure is described which allows the NS equations to be solved on a relatively coarse mesh using large implicit time-steps while the DSMC method is used in localized regions on a refined mesh. The MPC method accommodates a novel modular implementation which combines existing, state-of-the-art, DSMC and NS source codes, virtually un-modified, into a single modular code. Hypersonic flow over a 2D cylinder at various Mach numbers is simulated using DSMC, NS, and MPC methods and results are compared for accuracy. Added mesh refinement capability increases the efficiency of the MPC method which is able to reproduce DSMC flow field results for simple transitional flows up to 3 times faster while requiring half the memory. When applied to a mainly continuum flow, the MPC method reproduces non-equilibrium DSMC results in the near-wake region approximately 10 times faster than full DSMC simulation while using only 8% of the memory.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - 45th AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
Pages7449-7461
Number of pages13
ISBN (Print)1563478900, 9781563478901
DOIs
StatePublished - 2007
Event45th AIAA Aerospace Sciences Meeting 2007 - Reno, NV, United States
Duration: Jan 8 2007Jan 11 2007

Publication series

NameCollection of Technical Papers - 45th AIAA Aerospace Sciences Meeting
Volume11

Other

Other45th AIAA Aerospace Sciences Meeting 2007
CountryUnited States
CityReno, NV
Period1/8/071/11/07

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