Comparison of subgrid-scale models for large-eddy simulation of hydrodynamic and magnetohydrodynamic channel flows. Issue 7 (1st July 2019)

• Record Type: Journal Article
• Authors: Prinz, Sebastian; Schumacher, Jörg; Boeck, Thomas
• Is Part Of: International journal of numerical methods for heat & fluid flow. Volume 29:Issue 7(2019)
• Page Start: 2224
• Page End: 2236
• Publication Date: 2019-07-01
• Subjects: Magnetohydrodynamics -- Large-eddy simulation; Heat -- Transmission -- Mathematics -- Periodicals; Fluid dynamics -- Mathematics -- Periodicals; 536.2
• DOI: 10.1108/HFF-09-2018-0500
• Languages: English
• ISSNs: 0961-5539

Abstract

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.