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A High-Fidelity Turbulence Length Scale for Flow Simulation

  • Jing-Lei Xu
  • Ning Hu
  • Ge Gao
Conference paper
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 117)

Abstract

The difference and connection between RANS and LES is briefly discussed. After reviewing the success of several LES models some necessary qualities for modeled length scale are concluded. A new 3D von Karman length scale which leads to SAS models is thus proposed for real-life flow simulation. Its “LES” function is extensively evaluated via the simulation of benchmark isotropic decaying turbulence. This length scale can fully make use of the local mesh and yield satisfactorily fine results even at coarse mesh resolutions, and moreover the results have some sort of unity.

Keywords

Grid Scale Smagorinsky Model Dynamic Smagorinsky Model Clipping Procedure Model Length Scale 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.School of propulsionBeihang UniversityBeijingP.R. China
  2. 2.China Academy of Aerospace and AerodynamicsBeijingP.R. China

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