elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Accuracy improvements and investigations of a compressible second order finite volume code towards the incompressible limit

Langer, Stefan (2015) Accuracy improvements and investigations of a compressible second order finite volume code towards the incompressible limit. In: Jahresbericht 2015 zum 17. STAB-Workshop, pp. 100-101. 17. STAB-Workshop, 10.-11. Nov. 2015, Göttingen.

[img] PDF
8MB

Abstract

The accuracy of many existing finite volume codes, originally implemented to simulate compressible flows in the transonic or supersonic regime, often degrades as the onflow Mach number is small and tends to zero. The problem is that at low Mach number the Roe scheme or a similar formulated artificial viscosity scheme which is close to a Roe scheme present an excess of artificial viscosity which causes the loss of accuracy. The reason is that at low Mach number the stabilization terms are not of the same order as the flux terms because the wave speeds are of different magnitudes. It is the goal of this talk to present a new methodology to deal with low Mach number flows in a compressible code.

Item URL in elib:https://elib.dlr.de/99547/
Document Type:Conference or Workshop Item (Speech)
Title:Accuracy improvements and investigations of a compressible second order finite volume code towards the incompressible limit
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Langer, Stefanstefan.langer (at) dlr.deUNSPECIFIED
Date:10 November 2015
Journal or Publication Title:Jahresbericht 2015 zum 17. STAB-Workshop
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 100-101
Status:Published
Keywords:Low Mach number preconditioning
Event Title:17. STAB-Workshop
Event Location:Göttingen
Event Type:Workshop
Event Dates:10.-11. Nov. 2015
Organizer:Deutsche Strömungsmechanische Arbeitsgemeinschaft, STAB
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 - Flight Physics
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > C²A²S²E - Center for Computer Applications in AeroSpace Science and Engineering
Deposited By: Langer, Dr.rer.nat. Stefan
Deposited On:18 Nov 2015 15:30
Last Modified:31 Jul 2019 19:56

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.