Direct Numerical Simulation and PIV Measurement of Turbulent Boundary Layer over a Rod-Roughened Wall
作者： Seung-Hyun Lee , Jae Hwa Lee , Hyung Jin Sung
DOI: 10.1007/978-90-481-9631-9_1
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摘要: The effects of surface roughness on a spatially-developing turbulent boundary layer were investigated by performing direct numerical simulation and particle image velocimetry measurements TBLs over rough smooth walls. Introduction the elements augmented stresses in region y< 4 ∼ 5k s , where k is an effective sand height. However, has little effect vorticity fluctuations, kinetic energy budget quadratic components Reynolds shear stress outer layer. We also demonstrate modification coherent vortical structures rod-roughened wall using linear stochastic estimation.
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