dc.contributor.author | Holstad, Anders | nb_NO |
dc.date.accessioned | 2014-12-19T12:05:25Z | |
dc.date.available | 2014-12-19T12:05:25Z | |
dc.date.created | 2010-01-04 | nb_NO |
dc.date.issued | 2009 | nb_NO |
dc.identifier | 284058 | nb_NO |
dc.identifier.isbn | 978-82-471-1753-8 (printed ver.) | nb_NO |
dc.identifier.uri | http://hdl.handle.net/11250/237686 | |
dc.description.abstract | The present doctoral thesis concerns fluid flow in three-dimensional turbulent boundary layers. In such flows, both the direction and the magnitude of the mean flow vary with wall distance. A statistically stationary turbulent shear layer was generated in a plane channel configuration where the mean three-dimensionality was achieved by means of a spanwise pressure gradient. Direct numerical simulations were performed to solve the incompressible Navier-Stokes equations. Reynolds-averaged statistics and details of the ensemble-averaged near-wall coherent vortices of the skewed flow field were presented. Results from a unidirectional reference flow were also presented. In particular, the impact of mean-flow three-dimensionality on coherent vortices with opposite sense of rotation was investigated. Asymmetries in the vortex pattern which are impossible in two-dimensional boundary layers were observed. A model has been proposed to interpret structure modifications in three-dimensional wall-flows. | nb_NO |
dc.language | eng | nb_NO |
dc.publisher | Norges teknisk-naturvitenskapelige universitet, Fakultet for ingeniørvitenskap og teknologi, Institutt for marin teknikk | nb_NO |
dc.relation.ispartofseries | Doktoravhandlinger ved NTNU, 1503-8181; 2009:179 | nb_NO |
dc.title | Numerical investigation of turbulence in a skewed three dimensional channel flow | nb_NO |
dc.type | Doctoral thesis | nb_NO |
dc.contributor.department | Norges teknisk-naturvitenskapelige universitet, Fakultet for ingeniørvitenskap og teknologi, Institutt for marin teknikk | nb_NO |
dc.description.degree | PhD i marin teknikk | nb_NO |
dc.description.degree | PhD in Marine Technology | en_GB |