Premium
Three‐dimensional coarse large‐eddy simulations of the flow above two‐dimensional sinusoidal waves
Author(s) -
Salvetti M. V.,
Damiani R.,
Beux F.
Publication year - 2001
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/1097-0363(20010330)35:6<617::aid-fld104>3.0.co;2-m
Subject(s) - drag , mechanics , flow (mathematics) , reynolds number , large eddy simulation , amplitude , physics , pressure gradient , geology , turbulence , optics
Large‐eddy simulations (LES) of the flow over two‐dimensional sinusoidal waves with a very low grid resolution are presented. A dynamic two‐parameter subgrid scale (SGS) model is employed. A configuration characterized by a wave length of 0.6096 m, a maximum slope of 0.497, and a bulk velocity of 10 m s −1 is initially considered. Comparisons with experimental data, and with the results of a previous LES show that, in spite of the very low grid resolution, the mean flow and both the viscous and the pressure drag forces are well predicted. Some details of the flow, such as the presence of a secondary flow, are also captured. Thus, additional LES are carried out to investigate the effect of the Reynolds number ( Re ), and of the wave amplitude. In particular, the dependence of viscous and pressure drag on these parameters is studied and compared with the results of similar analyses in the literature. Copyright © 2001 John Wiley & Sons, Ltd.