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Title: Evaluation of detached eddy simulation for turbulent wake applications.


No abstract prepared.

Publication Date:
Research Org.:
Sandia National Laboratories
Sponsoring Org.:
OSTI Identifier:
Report Number(s):
TRN: US200709%%306
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Proposed for publication in the AIAA Journal.
Country of Publication:
United States

Citation Formats

Roy, Christopher John, and Barone, Matthew Franklin. Evaluation of detached eddy simulation for turbulent wake applications.. United States: N. p., 2006. Web.
Roy, Christopher John, & Barone, Matthew Franklin. Evaluation of detached eddy simulation for turbulent wake applications.. United States.
Roy, Christopher John, and Barone, Matthew Franklin. Sun . "Evaluation of detached eddy simulation for turbulent wake applications.". United States. doi:.
title = {Evaluation of detached eddy simulation for turbulent wake applications.},
author = {Roy, Christopher John and Barone, Matthew Franklin},
abstractNote = {No abstract prepared.},
doi = {},
journal = {Proposed for publication in the AIAA Journal.},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
  • Simulations of a low-speed square cylinder wake and a supersonic axisymmetric base wake are performed using the Detached Eddy Simulation (DES) model. A reduced-dissipation form of the Symmetric TVD scheme is employed to mitigate the effects of dissipative error in regions of smooth flow. The reduced-dissipation scheme is demonstrated on a 2D square cylinder wake problem, showing a dramatic increase in accuracy for a given grid resolution. The results for simulations on three grids of increasing resolution for the 3D square cylinder wake are compared to experimental data and to other LES and DES studies. The comparisons of mean flowmore » and global mean flow quantities to experimental data are favorable, while the results for second order statistics in the wake are mixed and do not always improve with increasing spatial resolution. Comparisons to LES studies are also generally favorable, suggesting DES provides an adequate subgrid scale model. Predictions of base drag and centerline wake velocity for the supersonic wake are also good, given sufficient grid refinement. These cases add to the validation library for DES and support its use as an engineering analysis tool for accurate prediction of global flow quantities and mean flow properties.« less
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  • This paper presents our initial work in performing large-eddy simulations of tidal turbine array flows. First, a horizontally-periodic precursor simulation is performed to create turbulent flow data. Then that data is used as inflow into a tidal turbine array two rows deep and infinitely wide. The turbines are modeled using rotating actuator lines, and the finite-volume method is used to solve the governing equations. In studying the wakes created by the turbines, we observed that the vertical shear of the inflow combined with wake rotation causes lateral wake asymmetry. Also, various turbine configurations are simulated, and the total power productionmore » relative to isolated turbines is examined. Staggering consecutive rows of turbines in the simulated configurations allows the greatest efficiency using the least downstream row spacing. Counter-rotating consecutive downstream turbines in a non-staggered array shows a small benefit. This work has identified areas for improvement, such as the use of a larger precursor domain to better capture elongated turbulent structures, the inclusion of salinity and temperature equations to account for density stratification and its effect on turbulence, improved wall shear stress modelling, and the examination of more array configurations.« less