Effect of a 2-D rough wall on the anisotropy of a turbulent channel flow

被引:0
作者
Djenidi, L [1 ]
Leonardi, S [1 ]
Orlandi, P [1 ]
Antonia, RA [1 ]
机构
[1] Univ Newcastle, Discipline Mech Engn, Newcastle, NSW 2308, Australia
来源
Engineering Turbulence Modelling and Experiments 6 | 2005年
关键词
turbulent channel flow; rough wall; Reynolds stress tensor anisotropy; turbulence modelling;
D O I
10.1016/B978-008044544-1/50019-4
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
The effects of 2-D roughness elements on the Reynolds stress anisotropy tensor, b(ij) (=(u(i)u(j)/q)-(1/3)delta(ij), where u(i)u(j) is the Reynolds stress tensor, q = u(i)u(i) and delta(ij) the Kronecker delta symbol) in a turbulent channel flow are investigated using data obtained from direct numerical simulations (DNSs). The roughness elements consist of transverse square rods with a size k and are placed on one wall of the channel only. While k is kept constant (k/h = 0.2, h is the half-width of the channel), the spacing, w, between the rods is varied from w/k = 1 to w/k = 39. The results show that the 2-D roughness dramatically changes the structure of the wall region flow, and that the changes are controlled by w/k. In terms of turbulence modelling, they indicate that the modelling of the near-wall region needs to reflect both the structural changes and the influence of w/k on these changes. Possible forms of models are discussed.
引用
收藏
页码:207 / 216
页数:10
相关论文
共 11 条
[1]   ANISOTROPY OF THE DISPERSION TENSOR IN A TURBULENT BOUNDARY-LAYER [J].
ANTONIA, RA ;
DJENIDI, L ;
SPALART, PR .
PHYSICS OF FLUIDS, 1994, 6 (07) :2475-2479
[2]   Combined immersed-boundary finite-difference methods for three-dimensional complex flow simulations [J].
Fadlun, EA ;
Verzicco, R ;
Orlandi, P ;
Mohd-Yusof, J .
JOURNAL OF COMPUTATIONAL PHYSICS, 2000, 161 (01) :35-60
[3]   Turbulence in plant canopies [J].
Finnigan, J .
ANNUAL REVIEW OF FLUID MECHANICS, 2000, 32 :519-571
[4]   CONTRIBUTION TOWARDS A REYNOLDS-STRESS CLOSURE FOR LOW-REYNOLDS-NUMBER TURBULENCE [J].
HANJALIC, K ;
LAUNDER, BE .
JOURNAL OF FLUID MECHANICS, 1976, 74 (APR22) :593-610
[5]   Turbulent flows over rough walls [J].
Jiménez, J .
ANNUAL REVIEW OF FLUID MECHANICS, 2004, 36 :173-196
[6]   PROGRESS IN DEVELOPMENT OF A REYNOLDS-STRESS TURBULENCE CLOSURE [J].
LAUNDER, BE ;
REECE, GJ ;
RODI, W .
JOURNAL OF FLUID MECHANICS, 1975, 68 (APR15) :537-566
[7]   2ND-MOMENT CLOSURE FOR THE NEAR-WALL SUBLAYER - DEVELOPMENT AND APPLICATION [J].
LAUNDER, BE ;
SHIMA, N .
AIAA JOURNAL, 1989, 27 (10) :1319-1325
[8]  
Leonardi S, 2003, J FLUID MECH, V491, P229, DOI [10.1017/S0022112003005500, 10.1017/S0020112003005500]
[9]  
LUMLEY JL, 1977, J FLUID MECH, V82, P161, DOI 10.1017/S0022112077000585
[10]  
Orlandi P, 1999, FLUID FLOW PHENOMENA