DNS and modelling of passive scalar transport in turbulent channel flow with a focus on scalar dissipation rate modelling

被引：42
|
作者：
Johansson, AV [1 ]
Wikström, PM [1 ]
机构：
[1] KTH, Dept Mech, S-10044 Stockholm, Sweden
来源：
FLOW TURBULENCE AND COMBUSTION | 2000年 / 63卷 / 1-4期
关键词：
passive scalar transport; DNS; turbulent channel flow; scalar variance dissipation rate;
D O I：
10.1023/A:1009948606944
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A direct numerical simulation of turbulent channel flow with an imposed mean scalar gradient is analyzed with a focus on passive scalar flux modelling and in particular the treatment of the passive scalar dissipation equation. The Prandtl number is 0.71 and the Reynolds number based on the wall friction velocity and the channel half width is 265. Budgets are presented for the passive scalar variance and its dissipation rate, as well as for the individual scalar flux components. These form a basis for a discussion of modelling issues related to explicit algebraic scalar flux modelling.
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页码：223 / 245
页数：23
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