Print Email Facebook Twitter A direct-numerical-simulation-based second-moment closure for turbulent magnetohydrodynamic flows Title A direct-numerical-simulation-based second-moment closure for turbulent magnetohydrodynamic flows Author Kenjere, S. Hanjali?, K. Bal, D. Faculty Applied Sciences Department Multi-Scale Physics Date 2004-03-22 Abstract A magnetic field, imposed on turbulent flow of an electrically conductive fluid, is known to cause preferential damping of the velocity and its fluctuations in the direction of Lorentz force, thus leading to an increase in stress anisotropy. Based on direct numerical simulations (DNS), we have developed a model of magnetohydrodynamic (MHD) interactions within the framework of the second-moment turbulence closure. The MHD effects are accounted for in the transport equations for the turbulent stress tensor and energy dissipation rate—both incorporating also viscous and wall-vicinity nonviscous modifications. The validation of the model in plane channel flows with different orientation of the imposed magnetic field against the available DNS (Re = 4600,Ha = 6), large eddy simulation (Re = 2.9×104,Ha = 52.5,125) and experimental data (Re = 5.05×104 and Re = 9×104, 0 ? Ha ? 400), show good agreement for all considered situations. Subject turbulencemagnetohydrodynamicsdampinginternal stressesBoltzmann equationPoisson equationchannel flow To reference this document use: http://resolver.tudelft.nl/uuid:e1de702f-1f8b-4623-9920-5252dd377dd0 DOI https://doi.org/10.1063/1.1649335 Publisher American Institute of Physics ISSN 1070-6631 Source http://link.aip.org/link/PHFLE6/v16/i5/p1229/s1 Source Physics of Fluids, 16 (5), 2004 Part of collection Institutional Repository Document type journal article Rights (c) 2004 The Author(s); American Institute of Physics Files PDF Kenjeres_2004.pdf 303.54 KB Close viewer /islandora/object/uuid:e1de702f-1f8b-4623-9920-5252dd377dd0/datastream/OBJ/view