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http://dx.doi.org/10.3795/KSME-B.2007.31.8.680

Generation of a Turbulent Boundary Layer Using LES  

Lim, Hee-Chang (부경대학교)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.31, no.8, 2007 , pp. 680-687 More about this Journal
Abstract
The paper presents a numerical simulation of flow of a turbulent boundary layer, representing a typical wind environment and matching a series of wind tunnel observations. The simulations are carried out at a Reynolds number of 20,000, based on the velocity U at a pseudo-height h, and large enough that the flow be effectively Reynolds number independent. Some wall models are proposed for the LES(Large Eddy Simulation) of the turbulent boundary layer over a rough surface. The Jenson number, $J=h/z_0$, based on the roughness length $z_0$, is 600 to match the wind tunnel data. The computational mesh is uniform with a spacing of h/32, as this aids rapid convergence of the multigrid solver, and the governing equations are discretised using second order finite differences within a parallel multiblock environment. The results presented include the comparison between wind tunnel measurements and LES computations of the turbulent boundary layer over rough surface.
Keywords
LES; Turbulent Boundary Layer; Wind Environment;
Citations & Related Records

Times Cited By SCOPUS : 2
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