Large-eddy simulation is used to study turbulent flow over a sinusoidal wavy wall from the perspective of surface roughness effects. Simulation results are averaged in time and space to obtain the so-called roughness function (shift in the logarithmic law), the equivalent sand-grain roughness and the virtual origin, and the dependence of these quantities on the amplitude-to-wavelength ratio. The results demonstrate the usefulness of LES to quantify roughness effects that have hitherto fore been the purview of laboratory experiments.
Use of Large-Eddy Simulation to Characterize Roughness Effect of Turbulent Flow Over a Wavy Wall
Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division Mar. 25, 2003; revised manuscript received June 30, 2003. Associate Editor: F. F. Grindstein.
Cui , J., Lin , C., and Patel , V. C. (January 12, 2004). "Use of Large-Eddy Simulation to Characterize Roughness Effect of Turbulent Flow Over a Wavy Wall ." ASME. J. Fluids Eng. November 2003; 125(6): 1075–1077. https://doi.org/10.1115/1.1624424
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