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Comparison of subgrid-scale models for large-eddy simulation of hydrodynamic and magnetohydrodynamic channel flows.

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Bibliographic Details
Title: Comparison of subgrid-scale models for large-eddy simulation of hydrodynamic and magnetohydrodynamic channel flows.
Authors: Prinz, Sebastian1 (AUTHOR) sebastian.prinz@tu-ilmenau.de, Schumacher, Jörg1 (AUTHOR) joerg.schumacher@tu-ilmenau.de, Boeck, Thomas1 (AUTHOR) thomas.boeck@tu-ilmenau.de
Source: International Journal of Numerical Methods for Heat & Fluid Flow. 2019, Vol. 29 Issue 7, p2224-2236. 13p.
Subjects: Channel flow, Magnetohydrodynamics, Energy transfer, Magnetic fields, Simulation methods & models
Abstract: Purpose: 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. Design/methodology/approach: 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. Findings: 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. Originality/value: This study demonstrates the necessity of improved SGS modeling strategies for magnetohydrodynamic channel flows within a collocated finite-volume scheme. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Purpose: 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. Design/methodology/approach: 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. Findings: 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. Originality/value: This study demonstrates the necessity of improved SGS modeling strategies for magnetohydrodynamic channel flows within a collocated finite-volume scheme. [ABSTRACT FROM AUTHOR]
ISSN:09615539
DOI:10.1108/HFF-09-2018-0500