choi_moin12

Summary

Grid-point requirements for large eddy simulation: Chapman's estimates revisited. H. Choi and P. Moin. Physics of Fluids, 24(1), 2012. (URL)

Abstract

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 Re, but a wall-resolving LES requires N~Re^(13/7), where Lx is the flat-plate length in the streamwise direction. On the other hand, direct numerical simulation, resolving the Kolmogorov length scale, requires N~Re^(37/14).

Bibtex entry

@ARTICLE { choi_moin12,
    AUTHOR = { H. Choi and P. Moin },
    TITLE = { Grid-point requirements for large eddy simulation: Chapman's estimates revisited },
    JOURNAL = { Physics of Fluids },
    VOLUME = { 24 },
    NUMBER = { 1 },
    YEAR = { 2012 },
    ABSTRACT = { 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 Re, but a wall-resolving LES requires N~Re^(13/7), where Lx is the flat-plate length in the streamwise direction. On the other hand, direct numerical simulation, resolving the Kolmogorov length scale, requires N~Re^(37/14). },
    URL = { http://dx.doi.org/10.1063/1.3676783 },
}