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ISSN Online: 2688-7231

ISBN Online: 978-1-56700-524-0

Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India
December, 17-20, 2021, IIT Madras, Chennai, India

Accelerating a Hypersonic CO2 Reaction Solver

Get access DOI: 10.1615/IHMTC-2021.3150
pages 2085-2090


During the re-entry of a spacecraft travelling at hypersonic Mach numbers aerodynamic heating, strong shock formation, shock-shock interactions in the presence of equilibrium or non-equilibrium gas chemistry is an important phenomenon. To address this, a 2-D unstructured finite volume method (FVM) based framework is developed using an automatic code generation approach based on the symbolic Python package SymPy in the current work. The generated solver is capable of simulating flows in CO2 rich Martian atmosphere. The flux vector splitting schemes are used for the discretization of the convective fluxes, the chemical kinetics for eight species consisting of N2, O2, NO, O, N, CO2, CO, and C incorporated along with 10 chemical reactions. The generated solver is auto parallelized by the OP2 framework and it is capable of running on single/multi core CPUs. The validation for canonical test cases like inviscid oblique shock generator and ramp induced shockwave boundary layer interactions is presented. The speedup of the solver was measured on a DGX machine with 30 cores using various programming paradigms like sequential, optimized sequential and OpenMP. The OpenMP solver is ~ 16× faster for the inviscid case and ~ 11× faster for the viscous case compared to the sequential version.
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