AFRL - RY - HS - TR - 2010 - 0016 New Shape Parameters for the Laminar , Transitional , and Turbulent Velocity Profiles

AFRL - RY - HS - TR - 2010 - 0014 The Mathematics of Flow Similarity of the Velocity Boundary Layer

AFRL-RY -HS-TR-20 10-0028 Cognitively Inspired Neural Network for Situation Recognition

Passive scalar mixing in a planar shear layer with laminar and turbulent inlet conditions

The effect of inlet conditions on the mixing of a passive scalar was investigated in a planar shear layer with inlet boundary layers that were laminar, tripped and naturally turbulent–transitional. Planar laser-induced fluorescence measurements of acetone were used to directly evaluate the shear layer structure, and were processed to determine probability density functions ~PDFs! of the mixture...

Transition to turbulence in a concentric annular pipe

In this study the pressure-drop, mean and rms axial velocity data are measured using a differential pressure transducer and a laser Doppler anemometer for the flow of Newtonian and non-Newtonian fluids in a concentric annular pipe (radius ratio =0.5) at various Reynolds numbers encompassing the laminar, transitional and turbulent regimes. Three different fluids are utilized; a semi-rigid shear-...

Numerical Simulation of Separation Bubble on Elliptic Cylinders Using Three-equation k-? Turbulence Model

Occurrence of laminar separation bubbles on solid walls of an elliptic cylinder has been simulated using a recently developed transitional model for boundary layer flows. Computational method is based on the solution of the Reynolds averaged Navier-Stokes (RANS) equations and the eddy-viscosity concept. Transitional model tries to simulate streamwise fluctuations, induced by freestream turbulen...