A new method of modeling the conditional scalar dissipation rate

被引：34

作者：

Devaud, CB ^{[1
]}

Bilger, RW

Liu, T

机构：

[1] Univ Waterloo, Dept Mech Engn, Waterloo, ON N2L 3G1, Canada

[2] Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia

[3] Natl Nat Sci Fdn China, Dept Mat Sci & Engn, Beijing 100085, Peoples R China

来源：

PHYSICS OF FLUIDS | 2004年 / 16卷 / 06期

关键词：

D O I：

10.1063/1.1699108

中图分类号：

O3 [力学];

学科分类号：

08 [工学]; 0801 [力学];

摘要：

A new method for calculating the conditional scalar dissipation rate <N\eta> is derived from the probability density function (pdf) transport equation for the conserved scalar Z. Two different formulations are obtained. One is the result of direct integration of the pdf transport equation and the second is further developed assuming a two-parameter presumed form for the pdf. A linear model is used for the conditional velocity. The model is compared with a direct numerical simulation (DNS) of inhomogeneous turbulent mixing. The results are in very good agreement with the DNS and perform better than Girimaji's model which is based on homogeneous flow properties. Further validation with some experimental data would be useful. The new method has also the potential of being easily implemented in a finite-volume computational fluid dynamics code. (C) 2004 American Institute of Physics.

引用

页码：2004 / 2011

页数：8

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