期刊
JOURNAL OF COMPUTATIONAL PHYSICS
卷 229, 期 14, 页码 5373-5393出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcp.2010.03.038
关键词
High-order spectral difference method; Large eddy simulation; Wall-adapting local eddy-viscosity model; Implicit LU-SGS algorithm
资金
- IWT [SBO 050163]
The filtered fluid dynamic equations are discretized in space by a high-order spectral difference (SD) method coupled with large eddy simulation (LES) approach. The subgrid-scale stress tensor is modelled by the wall-adapting local eddy-viscosity model (WALE). We solve the unsteady equations by advancing in time using a second-order backward difference formulae (BDF2) scheme. The nonlinear algebraic system arising from the time discretization is solved with the nonlinear lower-upper symmetric Gauss-Seidel (LU-SGS) algorithm. In order to study the sensitivity of the method, first, the implicit solver is used to compute the two-dimensional (2D) laminar flow around a NACA0012 airfoil at Re = 5 x 10(5) with zero angle of attack. Afterwards, the accuracy and the reliability of the solver are tested by solving the 2D turbulent flow around a square cylinder at Re = 10(4) and Re = 2.2 x 10(4). The results show a good agreement with the experimental data and the reference solutions. (C) 2010 Elsevier Inc. All rights reserved.
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