THE CONDITIONAL DISSIPATION RATE OF AN INITIALLY BINARY SCALAR IN HOMOGENEOUS TURBULENCE

被引：170

作者：

OBRIEN, EE ^{[1
]}

JIANG, TL ^{[1
]}

机构：

[1] SUNY BUFFALO,DEPT MECH & AEROSP ENGN,BUFFALO,NY 14260

来源：

PHYSICS OF FLUIDS A-FLUID DYNAMICS | 1991年 / 3卷 / 12期

关键词：

D O I：

10.1063/1.858127

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

It is shown that a necessary and sufficient condition for the scalar dissipation rate, conditioned on scalar value-phi, to be independent of phi is that the one-point scalar probability distribution function (pdf) is Gaussian. It is then shown that the amplitude mapping closure yields a closed-form, separable expression for the phi-dependence of the conditional dissipation rate in the case of an initial double-delta scalar pdf. If the initial binary scalar field is located at phi = +/- 1, the solution is exp{ - 2[erf-1(phi)]2}, a result that is strongly supported by earlier direct numerical simulations.

引用

页码：3121 / 3123

页数：3

共 13 条

[1]

BILGER RW, 1989, ANNU REV FLUID MECH, V21, P101

[2] PROBABILITY-DISTRIBUTION OF A STOCHASTICALLY ADVECTED SCALAR FIELD [J].