The three-dimensional (3D) incompressible flow past an open cavity in a channel is predicted using the Spalart–Almaras (SA) and the shear-stress-transport model (SST) based versions of detached eddy simulation (DES). The flow upstream of the cavity is fully turbulent. In the baseline case the length to depth ratio of the cavity is 2 and the Reynolds number . Unsteady RANS (URANS) is performed to better estimate the performance of DES using the same code and meshes employed in DES. The capabilities of DES and URANS to predict the mean flow, velocity spectra, Reynolds stresses, and the temporal decay of the mass of a passive contaminant introduced instantaneously inside the cavity are assessed based on comparisons with results from a well resolved large eddy simulation (LES) simulation of the same flow conducted on a very fine mesh and with experimental data. It is found that the SA-DES simulation with turbulent fluctuations at the inlet gives the best overall predictions for the flow statistics and mass exchange coefficient characterizing the decay of scalar mass inside the cavity. The presence of inflow fluctuations in DES is found to break the large coherence of the vortices shed in the separated shear layer that are present in the simulations with steady inflow conditions and to generate a wider range of 3D eddies inside the cavity, similar to LES. The predictions of the mean velocity field from URANS and DES are similar. However, URANS predictions show poorer agreement with LES and experiment compared to DES for the turbulence quantities. Additionally, simulations with a higher Reynolds number and with a larger length to depth ratio are conducted to study the changes in the flow and shear-layer characteristics, and their influence on the ejection of the passive contaminant from the cavity.
Skip Nav Destination
e-mail: sconstan@engineering.uiowa.edu
Article navigation
November 2007
Technical Papers
Assessment of Predictive Capabilities of Detached Eddy Simulation to Simulate Flow and Mass Transport Past Open Cavities
George Constantinescu,
George Constantinescu
Civil and Environmental Engineering Department and IIHR Hydroscience and Engineering,
e-mail: sconstan@engineering.uiowa.edu
The University of Iowa
, Iowa City, IA 52242
Search for other works by this author on:
Seung-O Park
Seung-O Park
Search for other works by this author on:
Kyoungsik Chang
George Constantinescu
Civil and Environmental Engineering Department and IIHR Hydroscience and Engineering,
The University of Iowa
, Iowa City, IA 52242e-mail: sconstan@engineering.uiowa.edu
Seung-O Park
J. Fluids Eng. Nov 2007, 129(11): 1372-1383 (12 pages)
Published Online: June 5, 2007
Article history
Received:
August 1, 2006
Revised:
June 5, 2007
Citation
Chang, K., Constantinescu, G., and Park, S. (June 5, 2007). "Assessment of Predictive Capabilities of Detached Eddy Simulation to Simulate Flow and Mass Transport Past Open Cavities." ASME. J. Fluids Eng. November 2007; 129(11): 1372–1383. https://doi.org/10.1115/1.2786529
Download citation file:
Get Email Alerts
Related Articles
On Homogenization-Based Methods for Large-Eddy Simulation
J. Fluids Eng (December,2002)
Direct Numerical Simulation of a Fully Developed Turbulent Channel Flow With Respect to the Reynolds Number Dependence
J. Fluids Eng (June,2001)
Comparison of LES of Steady Transitional Flow in an Idealized Stenosed Axisymmetric Artery Model With a RANS Transitional Model
J Biomech Eng (May,2011)
Local Mass/Heat Transfer on Turbine Blade Near-Tip Surfaces
J. Turbomach (July,2003)
Related Proceedings Papers
Related Chapters
Cavitating Structures at Inception in Turbulent Shear Flow
Proceedings of the 10th International Symposium on Cavitation (CAV2018)
Introduction
Mechanical Blood Trauma in Circulatory-Assist Devices
Antilock-Braking System Using Fuzzy Logic
International Conference on Mechanical and Electrical Technology, 3rd, (ICMET-China 2011), Volumes 1–3