Comparison of the Direct Numerical Simulation of Zero and Low Adverse Pressure Gradient Turbulent Boundary Layers


KITSIOS V., ATKINSON C., SILLERO J. A. , BORRELL G., Güngör A. G. , JIMENEZ J., ...Daha Fazla

3rd Symposium on Fluid-Structure-Sound Interactions and Control (FSSIC), Perth, Avustralya, 5 - 09 Temmuz 2015, ss.163-168 identifier identifier

Özet

Statistics from the direct numerical simulation (DNS) of an adverse pressure gradient (APG) turbulent boundary layer (TBL) are presented. Flow simulations are performed using a TBL DNS code with the desired APG applied via a tailored farfield boundary condition. The APG TBL has a maximum momentum thickness based Reynolds number (Re-delta 2) of 6000, and a near constant ratio of pressure velocity to freestream velocity, over a range of Re-delta 2 from 3000 to 5000. Streamwise velocity variance profiles are shown to collapse under outer velocity scaling as opposed to friction velocity scaling over this range.