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Aspects of large eddy simulation of homogeneous isotropic turbulence
Author(s) -
AntonopoulosDomis M.
Publication year - 1981
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/fld.1650010306
Subject(s) - isotropy , homogeneous isotropic turbulence , turbulence , large eddy simulation , wavenumber , computation , turbulence kinetic energy , kinetic energy , physics , statistical physics , exponent , detached eddy simulation , classical mechanics , computational fluid dynamics , k omega turbulence model , turbulence modeling , computational physics , mechanics , direct numerical simulation , mathematics , optics , reynolds averaged navier–stokes equations , algorithm , linguistics , philosophy , reynolds number
HOMTY, a code for Large Eddy Simulation of homogeneous isotropic turbulence is proven by successful simulation of two experiments. The role of each term in the equations of motion and the concept of filtering is examined. It is shown that ‘prefiltering’ is unnecessary, and the resulting additional term in the equations, instead of transferring energy to the subgrid scales, backscatters energy from the resolved large wavenumerbers to the small ones. The kinetic energy decay exponent is shown to depend on the low wavenumber part of the velocity spectrum. Pressure statistics are computed and found to be in agreement with previous computations.