Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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Approximate Coordinate Transformations for Simulation of Turbulent Flows with Wall Deformation

  • Kang, Sangmo (School of Automotive, Industrial and Mechanical Engineering, Daegu University)
  • Published : 2002.05.01
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Abstract

In the present paper, approximate coordinate transformations for simulation of turbulent flows with wall deformation, significantly reducing computational cost with little degradation in numerical accuracy, are presented. The Wavier-Stokes equations are coordinate-transformed with an approximation of Tailor-series truncation. The performance is evaluated by performing numerical simulations of a channel flow at Re$\sub$$\tau$/ = 140 with active wall motions of η$\sub$m/$\^$+/ $\leq$5. The approximate transformations provide flow structures as well as turbulence statistics in good agreement with those from a complete transformation [Phys. Fluids 12, 3301 (2000) ] and allow 25-30% savings in the CPU time as compared to the complete one.

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References

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