Near-wall turbulence structures in three-dimensional boundary layers
Le, Anh-Tuan, Coleman, Gary N. and Kim, John (2000) Near-wall turbulence structures in three-dimensional boundary layers. International Journal of Heat Fluid Flow, 21, (5), 480-488. (doi:10.1016/S0142-727X(00)00035-7).
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Description/Abstract
We examine the structure of near-wall turbulence in three-dimensional boundary layers (3DBLs), which we approximate by applying an impulsive spanwise motion to the lower wall of a turbulent channel flow.
Direct numerical simulation (DNS) data are analysed using probability density functions (PDFs), conditional-averaged quadrant analysis about Reynolds-stress-producing events, and visualization of vortices with the λ2-criterion. The evidence suggests that mean three-dimensionality breaks up the symmetry and alignment of near-wall structures, disrupting their self-sustaining mechanisms, and thereby causing a reduction in the turbulence kinetic energy (TKE).
| Item Type: | Article |
|---|---|
| ISSNs: | 0142-727X (print) |
| Related URLs: | |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | University Structure - Pre August 2011 > School of Engineering Sciences |
| Item ID: | 21325 |
| Date Deposited: | 19 Jul 2006 |
| Last Modified: | 01 Jun 2011 01:51 |
| Contributors: | Le, Anh-Tuan (Author) Coleman, Gary N. (Author) Kim, John (Author) |
| Date: | 2000 |
| Status: | Published |
| Contact Email Address: | anhtuan@seas.ucla.edu |
| URI: | http://eprints.soton.ac.uk/id/eprint/21325 |
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