Coherent structures in a zero-pressure-gradient and a strongly decelerated boundary layer

PIV Investigation into the Evolution of Vortical Structures in the Zero Pressure Gradient Boundary Layer

Experimental investigation has been carried out towards understanding the complex fluid dynamics involved in the interaction of vortical structures with zero pressure gradient boundary layer. A laminar boundary layer is produced on the flat plate placed in the water flume and the synthetic jet actuator is deployed on top of the plate at a definite distance from the leading edge. The synthetic j...

Structure of the zero-pressure-gradient turbulent boundary layer.

A processing of recent experimental data by Nagib and Hites [Nagib, H. & Hites, M. (1995) AIAA paper 95-0786, Reno, NV) shows that the flow in a zero-pressure-gradient turbulent boundary layer, outside the viscous sublayer, consists of two self-similar regions, each described by a scaling law. The results concerning the Reynolds-number dependence of the coefficients of the wall-region scaling l...

A study of convection velocities in a zero pressure gradient turbulent boundary layer

Time-resolved DPIV measurements performed in wall parallel planes at several wall normal locations in a turbulent boundary layer (TBL) are used to illuminate the distribution of wall parallel velocities in a three-dimensional energy spectrum over streamwise, spanwise, and temporal wavelengths. To our knowledge, this is the rst time this type of spectral distribution has been reported. Slices of...

Wall pressure and coherent structures in a turbulent boundary layer on a cylinder

Stephen R. Snarski and Richard M. Lueptow Journal of Fluid Mechanics / Volume 286 / March 1995, pp 137 ­ 171 DOI: 10.1017/S0022112095000681, Published online: 26 April 2006 Link to this article: http://journals.cambridge.org/abstract_S0022112095000681 How to cite this article: Stephen R. Snarski and Richard M. Lueptow (1995). Wall pressure and coherent structures in a turbulent boundary layer o...

Study of Boundary Layer Convective Heat Transfer with Low Pressure Gradient Over a Flat Plate Via He’s Homotopy Perturbation Method