Development of a parallel hybrid method for the DSMC and NS solver

Y. Y. Lian*, Jong-Shinn Wu, Gary Cheng, Roy Koomullil

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

6 Scopus citations

Abstract

A parallel 3-D hybrid DSMC-NS method using the unstructured grid topology has been proposed and developed such that near continuum flows or a region consisting of continuum, slip, and free-molecular flows can be simulated efficiently. A continuum breakdown parameter proposed by Wang and Boyd is used in the present work for determining the choice of solver in spatial domain. A hypersonic flow over a 2-D wedge and other test cases are employed to evaluate and validate the present hybrid method. Preliminary results show the simulation data of the present hybrid method is in good agreement with those of the pure DSMC method. In general, computational time using the hybrid method is lower than that using the pure DSMC method. In addition, the region with strong thermal non-equilibrium cannot be precisely identified by the continuum break down parameter proposed by Wang and Boyd. Future study is needed to develop an appropriate method to identify the thermal non-equilibrium region.

Original languageEnglish
Pages7045-7060
Number of pages16
StatePublished - 1 Dec 2005
Event43rd AIAA Aerospace Sciences Meeting and Exhibit - Reno, NV, United States
Duration: 10 Jan 200513 Jan 2005

Conference

Conference43rd AIAA Aerospace Sciences Meeting and Exhibit
CountryUnited States
CityReno, NV
Period10/01/0513/01/05

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