期刊
JOURNAL OF COMPUTATIONAL PHYSICS
卷 275, 期 -, 页码 25-40出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcp.2014.06.020
关键词
Lattice Boltzmann method; Large-eddy simulation; Boundary layer; Wall modeling; Subgrid modeling; Turbulent plane channel
资金
- Swiss National Science Foundation SNF [PA00P2_145364]
- Swiss National Science Foundation (SNF) [PA00P2_145364] Funding Source: Swiss National Science Foundation (SNF)
An original wall-model for lattice Boltzmann based large-eddy simulation is presented. It relies on either an analytical profile for the velocity profile within the first off-wall cell or the solution of Turbulent Boundary Layer Equations. The latter are solved thanks to a meshless approach to obtain a user-friendly method. The proposed method is observed to be both robust and accurate, yielding very satisfactory results in plane channel flow up to R-et = 20000 on uniform grids with Delta x(+) = Delta y(+) = Delta z(+) = 1000. The computed maximum error on skin friction is about 4% in most investigated cases on the coarsest grids (10 grid points across the half-channel height). It lies within 1-2% on finer grids with 20-60 uniformly distributed grid points in the channel half-height. (C) 2014 Elsevier Inc. All rights reserved.
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