An improved near-wall treatment for turbulent channel flows

被引：14
|
作者：
El Gharbi, Najla [1 ,3 ]
Absi, Rafik [2 ]
Benzaoui, Ahmed [3 ]
Bennacer, Rachid [4 ]
机构：
[1] Ctr Renewable Energy Dev, Algiers 16340, Algeria
[2] EBI Polytechn, F-95094 Cergy Pontoise, France
[3] Univ Sci & Technol Houari Boumediene, Energet & Fluid Mech Dept, Algiers 16111, Algeria
[4] Ecole Super Cachan, LMT Inst Cachan, F-94235 Cachan, France
来源：
INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS | 2011年 / 25卷 / 01期
关键词：
near-wall treatment; turbulent kinetic energy; channel flow; NUMERICAL-SIMULATION; CONVECTION; MODELS; TEMPERATURE;
D O I：
10.1080/10618562.2011.554832
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The success of predictions of wall-bounded turbulent flows requires an accurate description of the flow in the near-wall region. This article presents a comparative study between different near-wall treatments and presents an improved method. The study is applied to fully developed plane channel flow (i.e. the flow between two infinitely large plates). Simulations were performed using Fluent. Near-wall treatments available in Fluent were tested: standard wall functions, non-equilibrium wall function and enhanced wall treatment. A user defined function (UDF), based on an analytical profile for the turbulent kinetic energy (Absi, R., 2008. Analytical solutions for the modeled k-equation. ASME Journal of Applied Mechanics, 75 (4), 044501), is developed and implemented. Predicted turbulent kinetic energy profiles are presented and validated by DNS data.
引用
收藏
页码：41 / 46
页数：6
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