RT Book, Section
SR 00
A1 Jiménez Sendín, Javier
A1 Liñán Martínez, Amable
A1 Rogers, Michael M.
A1 Higuera Antón, Francisco
T1 A-priori testing of sub-grid models for chemically reacting nonpremixed turbulent shear flows
YR 1996
FD 1996
SP 89
OP 110
AB The [beta]assumed-pdf approximation of (Cook & Riley 1994) is tested as a subgrid model for the LES computation of nonpremixed turbulent reacting flows, in the limit of cold infinitely fast chemistry, for two plane turbulent mixing layers with different degrees of intermittency. Excellent results are obtained for the computation of integrals properties such as product mass fraction, and the model is applied to other quantities such as powers of the temperature and the pdf of the scalar itself. Even in these cases the errors are small enough to be useful in practical applications. The analysis is extended to slightly out of equilibrium problems such as the generation of radicals, and formulated in terms of the pdf of the scalar gradients. It is shown that the conditional gradient distribution is universal in a wide range of cases whose limits are established. Within those limits, engineering approximations to the radical concentration are also possible. It is argued that the experiments in this paper are essentially in the limit of infinite Reynolds number.
T2 Studying turbulence using numerical simulation databases - VI proceedings of the 1996 Summer Program, Center for Turbulence Research, [June 24 to July 19, 1996]
PB Standford
PP Standford
AV Published
LK http://oa.upm.es/2110/