MHD turbulence in a channel with spanwise magnetic field

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dc.creatorKrasnov, Dmitry
dc.creatorZikanov, Oleg
dc.creatorSchumacher, Joerg
dc.creatorBoeck, Thomas
dc.date2008-09-05
dc.date.accessioned2026-07-07T10:09:21Z
dc.date.available2026-07-07T10:09:21Z
dc.descriptionThe effect of a uniform spanwise magnetic field on a turbulent channel flow is investigated for the case of low magnetic Reynolds number. DNS and LES computations are performed for two values of the hydrodynamic Reynolds number (10^4 and 2\times 10^4) and the Hartmann number varying in a wide range. It is shown that the main effect of the magnetic field is the suppression of turbulent velocity fluctuations and momentum transfer in the wall-normal direction. This leads to drag reduction and transformation of the mean flow profile. The centerline velocity grows, the mean velocity gradients near the wall decrease, and the typical horizontal dimensions of the coherent structures enlarge upon increasing the Hartmann number. Comparison between LES and DNS results shows that the dynamic Smagorinsky model accurately reproduces the flow transformation.
dc.description27 pages, 14 Postscript figures, to appear in Phys. Fluids
dc.identifierhttps://arxiv.org/abs/0809.0964
dc.identifierhttp://arxiv.org/abs/0809.0964
dc.identifierPhys. Fluids, 20 (2008) 095105
dc.identifierdoi:10.1063/1.2975988
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/171296
dc.subjectFluid Dynamics
dc.titleMHD turbulence in a channel with spanwise magnetic field
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