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dc.contributor.authorGanapathisubramani, B.en_US
dc.contributor.authorLongmire, E. K.en_US
dc.contributor.authorMarusic, I.en_US
dc.contributor.authorPothos, S.en_US
dc.identifier.citationGanapathisubramani, B., Longmire, E. K., Marusic, I., & Pothos, S. (2005). Dual-plane PIV technique to determine complete velocity gradient tensor in a turbulent boundary layer. Experiments in Fluids, 39, 222-231.en_US
dc.description© 2005 Springer Verlag. Publisher PDF version is restricted access in accordance with the Springer Verlag policy. The original publication is available at www.springerlink.comen_US
dc.description.abstractSimultaneous dual-plane PIV experiments, which utilized three cameras to measure velocity components in two differentially separated planes, were performed in streamwise-spanwise planes in the log region of a turbulent boundary layer at a moderate Reynolds number (ReT ~ 1100). Stereoscopic data were obtained in one plane with two cameras, and standard PIV data were obtained in the other with a single camera. The scattered light from the two planes was separated onto respective cameras by using orthogonal polarizations. The acquired datasets were used in tandem with continuity to compute all 9 velocity gradients, the complete vorticity vector and other invariant quantities. These derived quantities were employed to analyze and interpret the structural characteristics and features of the boundary layer. Sample results of the vorticity vector are consistent with the presence of hairpin-shaped vortices inclined downstream along the streamwise direction. These vortices envelop low speed zones and generate Reynolds shear stress that enhances turbulence production. Computation of inclination angles of individual eddy cores using the vorticity vector suggests that the most probable inclination angle is 35° to the streamwise-spanwise plane with a resulting projected eddy inclination of 43° in the streamwise-wall-normal plane.en_US
dc.titleDual-plane PIV technique to determine complete velocity gradient tensor in a turbulent boundary layeren_US
dc.typeJournal (Paginated)en_US
melbourne.peerreviewPeer Revieweden_US
melbourne.affiliationUniversity of Melbourneen_US
melbourne.affiliation.departmentEngineering: Department of Mechanical and Manufacturing Engineeringen_US
melbourne.source.titleExperiments in Fluidsen_US
melbourne.contributor.authorMarusic, Ivan
melbourne.accessrightsThis item is currently not available from this repository

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