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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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).
|Subjects:||T Technology > TA Engineering (General). Civil engineering (General)|
|Divisions:||University Structure - Pre August 2011 > School of Engineering Sciences
|Date Deposited:||19 Jul 2006|
|Last Modified:||01 Jun 2011 01:51|
|Contributors:||Le, Anh-Tuan (Author)
Coleman, Gary N. (Author)
Kim, John (Author)
|Contact Email Address:||firstname.lastname@example.org|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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