Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/22873
Title: Large eddy simulation of turbulent channel flow with 3D roughness using a roughness element model
Authors: Yang, F
Zhang, HQ
Chan, CK 
Wang, XL
Issue Date: 2008
Publisher: Chinese Physical Society
Source: Chinese Physics Letters, 2008, v. 25, no. 1, p. 191-194 How to cite?
Journal: Chinese physics letters 
Abstract: Large eddy simulation of turbulent channel flow with dense and small 3D roughness elements is carried out using a roughness element model. Profiles of mean Reynolds stress, mean velocity and rms velocity as well as turbulent structures near the wall are obtained. The shear stress in the rough wall is larger than that in the smooth wall side and the rough wall has a larger influence on the channel flow. Profiles of mean streamwise velocity near the wall have logarithmic velocity distributions for both smooth and roughness walls, while there is a velocity decrease for the rough wall due to larger fractional drag. All the three components of rms velocities in the rough wall region are larger than that in the smooth wall region, and the roughness elements on the wall increase turbulent intensity in all directions. The streak spacing and average diameter of near wall quasi-streamwise vortices increase with the presence of roughness elements on the wall and it is shown that the rough wall induces complex and strong streamwise vortices. Results of dense and small 3D roughness elements in both turbulent statistics and structure, obtained with a relatively simple method, are found to be comparable to related experiments.
URI: http://hdl.handle.net/10397/22873
ISSN: 0256-307X
EISSN: 1741-3540
DOI: 10.1088/0256-307X/25/1/052
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

7
Last Week
0
Last month
0
Citations as of Sep 10, 2017

WEB OF SCIENCETM
Citations

3
Last Week
0
Last month
0
Citations as of Sep 21, 2017

Page view(s)

41
Last Week
3
Last month
Checked on Sep 17, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.