Document Type

Article

Publication Date

2008

Journal or Book Title

Physics of Fluids

Volume

20

First Page

077105-1

Last Page

077105-6

DOI

10.1063/1.2930671

Abstract

Experimental results for conditional statistics in a confined turbulent wake were compared to the linear model and the transported probability density function (PDF) model for predicting the velocity conditioned on scalar mixture fraction and to a linear model for predicting the scalar mixture fraction conditioned on velocity. For velocity conditioned on scalar mixture fraction, the linear model was found to accurately predict the conditional transverse velocity, but for the conditional streamwise velocity, agreement between the experiments and the linear model was poor. The transverse conditional velocity was accurately predicted by the transported PDF model, but for the streamwise conditional velocity, a modified transported PDF model that incorporated two components of the scalar diffusivity tensor had to be used. Finally, it was found that a linear model for predicting the fluctuating scalar conditioned on velocity performed poorly due to the strongly non-Gaussian scalar PDF at the downstream locations investigated.

Comments

This article is from Physics of Fluids 20 (2008): 077105-1 - 077105-6, DOI: 10.1063/1.2930671. Posted with permission.

Copyright Owner

American Institute of Physics

Language

en

File Format

application/pdf

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