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Assessment of resolution quality for LES

Knopp, Tobias and Zhang, Xiaoqin and Lube, Gert (2010) Assessment of resolution quality for LES. EUROMECH 504 Large Eddy Simulation for Aerodynamics and Aeroacoustics, 23.-25. Mar. 2009, Muenchen; Germany.

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Abstract

We attempt to assess the resolution quality of Large-Eddy Simulation (LES) using single-grid estimators. We perform a study of LES on successively refined meshes for turbulent channel flow at Re_tau=4800 and for flow over a backward-facing step at Re_h=37500. Refinement indicators (or sensors) based on (i) resolved turbulent kinetic energy and (ii) resolved turbulent shear stress are evaluated. LES on successively refined meshes shows a clear trend of ''convergence'' for mean and fluctuation velocity profiles and that the quality of spatial resolution can be assessed by these two sensors for attached boundary layers and for free-shear layers.

Item URL in elib:https://elib.dlr.de/67116/
Document Type:Conference or Workshop Item (Speech)
Title:Assessment of resolution quality for LES
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Knopp, TobiasTobias.Knopp (at) dlr.deUNSPECIFIED
Zhang, XiaoqinUNSPECIFIEDUNSPECIFIED
Lube, GertUNSPECIFIEDUNSPECIFIED
Date:2010
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Large-eddy simulation; channel flow; backward facing step; wall-functions; grid convergence study
Event Title:EUROMECH 504 Large Eddy Simulation for Aerodynamics and Aeroacoustics
Event Location:Muenchen; Germany
Event Type:international Conference
Event Dates:23.-25. Mar. 2009
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Concepts & Integration (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > CASE
Deposited By: Knopp, Dr.rer.nat. Tobias
Deposited On:21 Dec 2010 15:09
Last Modified:31 Jul 2019 19:29

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