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Implementation and Validation of a Computationally Efficient DNS Solver for Reacting Flows in OpenFOAM

Zirwes, T. ORCID iD icon; Zhang, F.; Habisreuther, P. ORCID iD icon; Denev, J.; Bockhorn, H.; Trimis, D.


To meet future climate goals, the efficiency of combustion devices has to be increased. This requires a better understanding of the underlying physics. The simulation of turbulent flames is a challenge because of the multi-scale nature of combustion processes: relevant length scales span over five orders of magnitude and time scales over more than ten. Because of this, the direct numerical simulation (DNS) of turbulent flames is only possible on large supercomputers. A DNS solver for chemically reacting flows implemented in the open-source framework OpenFOAM is presented. The thermo-chemical library Cantera is used to compute detailed transport coefficients based on kinetic gas theory. The multi-scale nature of time scales, which are much lower for the combustion chemistry than for the flow, are bridged by an operator splitting approach, which employs the open-source solver Sundials to integrate chemical reaction rates. Because the direct simulation of turbulent flames has to be performed on supercomputers, special care has been taken to improve the computational performance. A tool was developed which generates highly optimized C++ source code for the computation of chemical reaction rates. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000141928
Veröffentlicht am 15.01.2022
DOI: 10.23967/wccm-eccomas.2020.175
Zitationen: 7
Zitationen: 9
Cover der Publikation
Zugehörige Institution(en) am KIT Steinbuch Centre for Computing (SCC)
Universität Karlsruhe (TH) – Zentrale Einrichtungen (Zentrale Einrichtungen)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2021
Sprache Englisch
Identifikator KITopen-ID: 1000141928
HGF-Programm 46.21.01 (POF IV, LK 01) Domain-Specific Simulation & SDLs and Research Groups
Erschienen in 14th WCCM-ECCOMAS Congress 2020: Collection of papers presented at the 14th edition of the WCCM-ECCOMAS, virtual congress, January, 11-15, 2021. Ed.: F. Chinesta
Verlag Scipedia S.L.
Schlagwörter Direct Numerical Simulation, Reacting Flows, OpenFOAM, Cantera
Nachgewiesen in Dimensions
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