This paper aims to address the performance of different subgrid-scale models (SGS) for hydro- (HD) and magnetohydrodynamic (MHD) channel flows within a collocated finite-volume scheme.
First, the SGS energy transfer is analyzed by a priori tests using fully resolved DNS data. Here, the focus lies on the influence of the magnetic field on the SGS energy transport. Second, the authors performed a series of 18 a posteriori model tests, using different grid resolutions and SGS models for HD and MHD channel flows.
From the a priori analysis, the authors observe a quantitative reduction of the SGS energy transport because of the action of the magnetic field depending on its orientation. The a posteriori model tests show a clear improvement because of the use of mixed-models within the numerical scheme.
This study demonstrates the necessity of improved SGS modeling strategies for magnetohydrodynamic channel flows within a collocated finite-volume scheme.
This work is supported by the Deutsche Forschungsgemeinschaft with grant No. GRK 1567. The authors also thank the John von Neumann Institute for Computing for support by grant HIL04.
Prinz, S., Schumacher, J. and Boeck, T. (2019), "Comparison of subgrid-scale models for large-eddy simulation of hydrodynamic and magnetohydrodynamic channel flows", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 29 No. 7, pp. 2224-2236. https://doi.org/10.1108/HFF-09-2018-0500
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