Publisher : The Korean Society of Mechanical Engineers
DOI : 10.22634/KSME-B.2001.25.11.1467
Title & Authors
Approximate Coordinate Transformations for Simulation of Turbulent Flows with Active Wall Motions Gang, Sang-Mo;
In the present paper, approximate coordinate transformations for simulation of turbulent flows with active wall motions, leading to a significant reduction in the computational cost while maintaining the numerical accuracy, are presented: the Navier-Stokes equations are coordinate-transformed with an approximation of Taylor-series truncation and neglect of some less-significant terms. The performance of the proposed transformations is evaluated in simulation of the channel flow at Re/=140 with wall deformations of │ηm/+/ 5. The approximate transformations provide flow structures as wall as turbulence statistics in good agreement with those from a complete coordinate transformation [Phys. Fluids 12, 3301 (2000)] and allow 25-30% savings in the CPU time as compared to the complete one.