The paper is devoted to the further development and systematic performance evaluation of a recent deterministic framework Nesvetay-3D for modelling three-dimensional rarefied gas flows. Firstly, a review of the existing discretization and parallelization strategies for solving numerically the Boltzmann kinetic equation with various model collision integrals is carried out. Secondly, a new parallelization strategy for the implicit time evolution method is implemented which improves scaling on large CPU clusters. Accuracy and scalability of the methods are demonstrated on a pressure-driven rarefied gas flow through a finite-length circular pipe as well as an external supersonic flow over a three-dimensional re-entry geometry of complicated aerodynamic shape. ©2013 Published by Elsevier Inc

Construction and comparison of parallel implicit kinetic solvers in three spatial dimensions / Vladimir, Titarev; Dumbser, Michael; Sergey, Utyuzhnikov. - In: JOURNAL OF COMPUTATIONAL PHYSICS. - ISSN 0021-9991. - STAMPA. - 256:(2014), pp. 17-33. [10.1016/j.jcp.2013.08.051]

Construction and comparison of parallel implicit kinetic solvers in three spatial dimensions

Dumbser, Michael;
2014-01-01

Abstract

The paper is devoted to the further development and systematic performance evaluation of a recent deterministic framework Nesvetay-3D for modelling three-dimensional rarefied gas flows. Firstly, a review of the existing discretization and parallelization strategies for solving numerically the Boltzmann kinetic equation with various model collision integrals is carried out. Secondly, a new parallelization strategy for the implicit time evolution method is implemented which improves scaling on large CPU clusters. Accuracy and scalability of the methods are demonstrated on a pressure-driven rarefied gas flow through a finite-length circular pipe as well as an external supersonic flow over a three-dimensional re-entry geometry of complicated aerodynamic shape. ©2013 Published by Elsevier Inc
2014
Vladimir, Titarev; Dumbser, Michael; Sergey, Utyuzhnikov
Construction and comparison of parallel implicit kinetic solvers in three spatial dimensions / Vladimir, Titarev; Dumbser, Michael; Sergey, Utyuzhnikov. - In: JOURNAL OF COMPUTATIONAL PHYSICS. - ISSN 0021-9991. - STAMPA. - 256:(2014), pp. 17-33. [10.1016/j.jcp.2013.08.051]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/66741
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