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Scale-Resolving Simulations on Unstructured Meshes with a Low-Dissipation Low-Dispersion Scheme

Probst, Axel (2016) Scale-Resolving Simulations on Unstructured Meshes with a Low-Dissipation Low-Dispersion Scheme. 20. DGLR-Fach-Symposium der STAB, 09. Nov. 2016, Braunschweig, Deutschland.

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Abstract

Introduction Scale-resolving simulations such as hybrid RANS/LES methods (HRLM) are considered as promising approaches for improved numerical predictions of aeronautical flows near the boarder of the flight envelope. Due to the requirement to locally resolve turbulent fluctua-tions, these methods rely on an accurate spatial discretization, both in terms of the grid reso-lution and the numerical scheme for the flow equations. For this reason, most scale-resolving flow solvers apply structured grid metrics, which provide regular mesh cells and allow for rather easy implementation of higher-order schemes. However, with the increasing demand for simulations of complex geometries, e.g., high-lift wings with brackets and in-stalled engines, the generation of purely structured grids becomes infeasible and is often abandoned in favour of unstructured methods, such as the widely-used DLR-TAU code. To qualify the TAU code for accurate scale-resolving simulations, a low-dissipation low-dispersion (LD2) scheme suitable for unstructured solvers has recently been developed [1]. While the LD2-scheme has already been shown to improve HRLM predictions on structured grids [2], the present work comprises first systematic studies on the applicability and accura-cy of the LD2-scheme on industry-relevant unstructured or hybrid grids.

Item URL in elib:https://elib.dlr.de/104606/
Document Type:Conference or Workshop Item (Speech)
Title:Scale-Resolving Simulations on Unstructured Meshes with a Low-Dissipation Low-Dispersion Scheme
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Probst, Axelaxel.probst (at) dlr.deUNSPECIFIED
Date:2016
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:hybrid RANS/LES, unstructured meshes, LD2-scheme
Event Title:20. DGLR-Fach-Symposium der STAB
Event Location:Braunschweig, Deutschland
Event Type:national Conference
Event Dates:09. Nov. 2016
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, L - VicToria
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > CASE, GO
Deposited By: Bachmann, Barbara
Deposited On:10 Jan 2017 16:02
Last Modified:06 Oct 2017 07:39

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