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An open-source hybrid CFD-DSMC solver for high speed flows

Espinoza, Daniel and Casseau, Vincent and Scanlon, Thomas and Brown, Richard (2016) An open-source hybrid CFD-DSMC solver for high speed flows. In: Proceedings of the 30th International Symposium on Rarefied Gas Dynamics. AIP Conference Proceedings, 1786 . American Institute of Physics, Melville, N.Y.. ISBN 9780735414488

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    Abstract

    During re-entry, a spacecraft will experience flow conditions ranging from highly rarefied to continuum. To simulate regions in between, a hydrodynamic-molecular gas hybrid solver should be used to provide accuracy and effciency. Currently available hybrid codes are in-house codes or do not provide the capabilities to simulate all of the phenomena a spacecraft will experience during re-entry. An open-source CFD-DSMC hybrid code is being developed within the OpenFOAM framework, coupling the solvers dsmcFoam and hy2Foam. In this paper, comparison between the CFD, DSMC and hybrid codes have been performed for simple cases. The dsmcFoam and the hybrid code have shown to compare satisfactorily.