LARGE-EDDY-SIMULATION OF TURBULENT MAGNETOHYDRODYNAMIC FLOWS
作者: Johannes Wölck Gunther Brenner
刊名: Thermal Science, 2018, Vol.21 (Supplement), pp.S617-S628
来源数据库: Society for Thermal Engineers of Serbia
DOI: https://doi.org/10.2298/TSCI161215092W
关键词: MagnetohydrodynamicsHartmann flowPeriodic channel flowLarge-Eddy-SimulationK-equation subgrid-scale modelOpen-FOAMMHDpisoFoam
原始语种摘要: A magnetohydrodynamic turbulent channel flow under the influence of a wallnormal 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...
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关键词翻译
关键词翻译
  • equation 方程
  • initial 开首字母
  • values 价值观
  • higher 
  • range 射程
  • decrease 减少
  • parameters 参数
  • influence 影响
  • scaling 按比例缩小
  • scale 度盘