Volume 40 Issue 12
Dec.  2014
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Zheng Weilin, Yan Chao. Influence analysis on grid scale limiter of XY-SAS model[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(12): 1725-1729. doi: 10.13700/j.bh.1001-5965.2013.0742(in Chinese)
Citation: Zheng Weilin, Yan Chao. Influence analysis on grid scale limiter of XY-SAS model[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(12): 1725-1729. doi: 10.13700/j.bh.1001-5965.2013.0742(in Chinese)

Influence analysis on grid scale limiter of XY-SAS model

doi: 10.13700/j.bh.1001-5965.2013.0742
  • Received Date: 08 Jan 2014
  • Publish Date: 20 Dec 2014
  • The Xu & Yan scale adaptive simulation (XY-SAS) model is based on the introduction of the von Karman length scale into the destruction term of spalart-allmaras (SA) turbulence model, which results in a large eddy simulation (LES)-like behavior in unsteady regions of the flowfield without explicit grid dependence. Because the SAS models could not provide sufficient damping of the smallest scales, the grid spacing was introduced as the high wave number damping limitation. Three different XY-SAS models were constructed by using various grid limiters and were tested by the numerical example of circular cylinder at Re=3 900. The numerical results were compared with detached eddy simulation (DES) and experimental data. It is concluded that, the grid limiter has a strong influence on the performance of the model and the minimum grid spacing is a good limitation, under which the XY-SAS model performs as well as DES method.

     

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