Journal of Fluids Engineering

Volume: Page/CID:

Control of Vortex Shedding From a Plate at Incidence Angles in the Range of 0–90 Deg
A thin strip cross-sectional element is used to suppress vortex shedding from a plate with a width to thickness ratio of 4.0 at incidence angles in the range of 0–90 deg and a Reynolds number of...

Creation and Maintenance of Cavities Under Horizontal Surfaces in Steady and Gust Flows
An experimental study of air supply to bottom cavities stabilized within a recess under a horizontal surface has been carried out in a specially designed water tunnel. The air supply necessary for cre...

J. Fluids Eng. / Volume 131 / Issue 11 / Research Papers / Fundamental Issues and Canonical Flows

Assessment of DES Models for Separated Flow From a Hump in a Turbulent Boundary Layer

J. Fluids Eng. -- November 2009 -- Volume 131, Issue 11, 111203 (9 pages)
doi:10.1115/1.4000376

You are not logged into the ASME Digital Library.
Log in

ABSTRACT

REFERENCES (17)

Author(s):
Daniel C. Lyons, Hydraulic Engineer
VHCE York, Voith Hydro, Inc., York, PA 17405

Leonard J. Peltier, Senior Engineering Specialist in CFD
Bechtel National, Inc., Frederick, MD 21703

Frank J. Zajaczkowski, Assistant Research Engineer
The Applied Research Laboratory, The Pennsylvania State University, University Park, PA 16804

Eric G. Paterson, Senior Research Associate
The Applied Research Laboratory, The Pennsylvania State University, University Park, PA 16802; Associate Professor Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA 16802

Separatedflow past a hump in a turbulent boundary layer isstudied numerically using detached-eddy simulation (DES), zonal detached-eddy simulation (ZDES),delayed detached-eddy simulation (DDES), and Reynolds-averaged Navier–Stokes (RANS) modeling. Thegeometry is smooth so the separation point is a functionof the flow solution. Comparisons to experimental data show thatRANS with the Spalart–Allmaras turbulence model predicts the mean-field statisticswell. The ZDES and DDES methods perform better than theDES formulation and are comparable to RANS in most statistics.Analyses motivate that modeled-stress depletion near the separation point contributesto differences observed in the DES variants. The order ofaccuracy of the flow solver ACUSOLVE is also documented.