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High-order unstructured grid generation and Discontinuous Galerkin discretization applied to a 3D high-lift configuration

Hartmann, Ralf and Leicht, Tobias (2015) High-order unstructured grid generation and Discontinuous Galerkin discretization applied to a 3D high-lift configuration. AIAA. 53rd AIAA Aerospace Sciences Meeting (SciTech 2015), 5-9 Jan 2015, Kissimmee, Florida.

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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 Discontinuous Galerkin flow solution applied to a turbulent flow around a 3D high-lift configuration. This includes (i) the generation of an appropriately coarse straight-sided mesh, (ii) the evaluation of additional points on the CAD 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 Discontinuous Galerkin discretization which is sufficiently stable to allow a flow computation on the resulting curved mesh. Finally, a fourth order flow solution of the RANS and k-omega turbulence model equations computed on a fourth order unstructured hybrid mesh around a 3D high-lift configuration will be compared against wind-tunnel measurements of the SWING project.

Item URL in elib:https://elib.dlr.de/92442/
Document Type:Conference or Workshop Item (Speech)
Title:High-order unstructured grid generation and Discontinuous Galerkin discretization applied to a 3D high-lift configuration
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hartmann, RalfRalf.Hartmann (at) dlr.deUNSPECIFIED
Leicht, TobiasTobias.Leicht (at) dlr.deUNSPECIFIED
Date:2015
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:2015
Publisher:AIAA
Status:Published
Keywords:Higher order grid generation, higher order flow solution, Discontinuous Galerkin methods
Event Title:53rd AIAA Aerospace Sciences Meeting (SciTech 2015)
Event Location:Kissimmee, Florida
Event Type:international Conference
Event Dates:5-9 Jan 2015
Organizer:AIAA
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:25 Nov 2015 10:30
Last Modified:25 Nov 2015 10:30

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