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Grid-point requirements for large eddy simulation: Chapman’s estimates revisited

2012; American Institute of Physics; Volume: 24; Issue: 1 Linguagem: Inglês

10.1063/1.3676783

1527-2435

Haecheon Choi, Parviz Moin,

Aerodynamics and Acoustics in Jet Flows

Resolution requirements for large eddy simulation (LES), estimated by Chapman [AIAA J. 17, 1293 (1979)], are modified using accurate formulae for high Reynolds number boundary layer flow. The new estimates indicate that the number of grid points (N) required for wall-modeled LES is proportional to ReLx, but a wall-resolving LES requires ÑReLx13/7, where Lx is the flat-plate length in the streamwise direction. On the other hand, direct numerical simulation, resolving the Kolmogorov length scale, requires ÑReLx37/14.