LARGE-EDDY-SIMULATION OF TURBULENT MAGNETOHYDRODYNAMIC FLOWS

被引：0
|
作者：
Woelcic, Johannes [1 ]
Brenner, Gunther [1 ]
机构：
[1] Tech Univ Clausthal, Fac Mech Engn, Dept Appl Mech, Clausthal Zellerfeld, Germany
来源：
THERMAL SCIENCE | 2017年 / 21卷
关键词：
magnetohydrodynamics; Hartmann flow; periodic channel flow; Large-Eddy-Simulation; k-equation subgrid-scale model; Open-FOAM; MHDpisoFoam; MAGNETIC REYNOLDS-NUMBER; DIRECT-NUMERICAL-SIMULATION; CHANNEL FLOW; EQUATIONS; CLOSURE; FIELD;
D O I：
10.2298/TSCI161215092W
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A magnetohydrodynamic turbulent channel flow under the influence of a wall normal magnetic field is investigated using the Large-Eddy-Simulation technique and k-equation subgrid-scale-model. Therefore, the new solver MHDpisoFoam is implemented in the OpenFOAM CFD-Code. The temporal decay of an initial turbulent field for different magnetic parameters is investigated. The rms values of the averaged velocity fluctuations show a similar, trend for each coordinate direction. 80% of the fluctuations are damped out in the range between 0 < Ha < < 75 at Re = 6675. The trend can be approximated via an exponential of the form exp(-a.Ha), where a is a scaling parameter. At higher Hartmann numbers the fluctuations decrease in an almost linear way. Therefore, the results of this study show that it may be possible to construct a general law for the turbulence damping due to action of magnetic fields.
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页码：S617 / S628
页数：12
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