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Wall-resolved and wall-modeled ILES based on high-order DG

Hartmann, Ralf (2019) Wall-resolved and wall-modeled ILES based on high-order DG. In: 6th European Conference on Computational Mechanics, ECCM 2018 and 7th European Conference on Computational Fluid Dynamics, ECFD 2018, pp. 4194-4207. ECCM-ECFD 2018 conference, 11. -15. Juni 2018, Glasgow.

Full text not available from this repository.

Official URL: http://www.eccm-ecfd2018.org/frontal/docs/Ebook-Glasgow-2018-ECCM-VI-ECFD-VII.pdf

Abstract

In wall-modeled large eddy simulations (WM-LES) based on wall-stress-models, flow scales are resolved in the outer boundary layer and modeled in the inner layer. In order to avoid the so-called "log-layer mismatch", we take the thickness h_wm of the wall-modeled layer not to be the typically used frist grid layer thickness, but we take it independent of the grid as 20% of the boundary layer thickness. Important input to the wall-shear-stress approach is the near-wall velocity profile for which various approximations exist. In this work, we compare the results of the wall-shear-stress approach with the near-wall velocity profile given by Reichardt's law to the results of the wall-shear-stress approach where the near-wall velocity profile is given by DNS data. The WM-LES approach is implemented in the context of implicit large eddy simulations (ILES) based on high-order Discontinuous Galerkin methods. Numerical results are shown for the periodic channel flow. Comparisons are given for wall-modeled ILES to ILES (without wall-model) as well as to DNS data.

Item URL in elib:https://elib.dlr.de/127220/
Document Type:Conference or Workshop Item (Speech)
Title:Wall-resolved and wall-modeled ILES based on high-order DG
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Hartmann, RalfUNSPECIFIEDhttps://orcid.org/0000-0002-0403-1221UNSPECIFIED
Date:2019
Journal or Publication Title:6th European Conference on Computational Mechanics, ECCM 2018 and 7th European Conference on Computational Fluid Dynamics, ECFD 2018
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 4194-4207
Editors:
EditorsEmailEditor's ORCID iDORCID Put Code
Owen, RogerUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
de Borst, ReneUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Reese, JasonUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pearce, ChrisUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Status:Published
Keywords:wall-modeled large eddy simulation, Discontinuous Galerkin, channel flow
Event Title:ECCM-ECFD 2018 conference
Event Location:Glasgow
Event Type:international Conference
Event Dates:11. -15. Juni 2018
Organizer:R. Owen, R. de Borst, J. Reese and C. Pearce
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation (old)
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > CASE, BS
Deposited By: Hartmann, Dr.rer.nat. Ralf
Deposited On:02 Dec 2021 08:37
Last Modified:02 Dec 2021 08:37

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