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Generation of unstructured curvilinear grids and high-order Discontinuous Galerkin discretization applied to a 3D high-lift configuration

Hartmann, Ralf and Leicht, Tobias (2016) Generation of unstructured curvilinear grids and high-order Discontinuous Galerkin discretization applied to a 3D high-lift configuration. International Journal for Numerical Methods in Fluids, 82 (6), pp. 316-333. Wiley. DOI: 10.1002/fld.4219 ISSN 0271-2091

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/fld.4219/abstract

Abstract

Discontinuous Galerkin (DG) methods allow high-order flow solutions on unstructured or locally refined meshes by increasing the polynomial degree and using curved instead of straight-sided elements. However, one of the currently largest obstacles to applying these methods to aerodynamic configurations of medium to high complexity is the availability of appropriate higher-order curved meshes. In this article, we describe a complete chain of higher-order unstructured grid generation and higher-order DG flow solution applied to a turbulent flow around a three-dimensional high-lift configuration. This includes (i) the generation of an appropriately coarse straight-sided mesh; (ii) the evaluation of additional points on the computer-aided design geometry of the curved-wall boundary for defining a piecewise polynomial boundary representation; (iii) a higher order mesh deformation to translate the curvature from the wall boundary into the interior of the computational domain; and (iv) the description of a DG discretization, which is sufficiently stable to allow a flow computation on the resulting curved mesh. Finally, a fourth-order flow solution of the Reynolds-averaged Navier-Stokes and k-ω turbulence model equations is computed on a fourth-order unstructured hybrid mesh around the three-dimensional high-lift simulation of wing-flow noise generation configuration.

Item URL in elib:https://elib.dlr.de/109318/
Document Type:Article
Title:Generation of unstructured curvilinear grids and high-order Discontinuous Galerkin discretization applied to a 3D high-lift configuration
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hartmann, Ralfralf.hartmann (at) dlr.dehttps://orcid.org/0000-0002-0403-1221
Leicht, Tobiastobias.leicht (at) dlr.deUNSPECIFIED
Date:26 January 2016
Journal or Publication Title:International Journal for Numerical Methods in Fluids
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:82
DOI :10.1002/fld.4219
Page Range:pp. 316-333
Editors:
EditorsEmail
Farhat, CharbelUNSPECIFIED
Wall, Wolfgang A.UNSPECIFIED
Publisher:Wiley
ISSN:0271-2091
Status:Published
Keywords:curvilinear grid generation; unstructured grid generation; discontinuous Galerkin methods; high-lift configuration
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
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > C²A²S²E - Center for Computer Applications in AeroSpace Science and Engineering
Deposited By: Hartmann, Dr.rer.nat. Ralf
Deposited On:12 Dec 2016 10:00
Last Modified:12 Dec 2016 10:00

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