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Implementing a time-accurate implicit-explicit method with error estimation for compressible flow

Oßwald, Kai and Hannemann, Volker and Birken, Philipp (2013) Implementing a time-accurate implicit-explicit method with error estimation for compressible flow. 2nd TRR40 Summer Research Program, 09. Aug. 2013, Munich, Germany.

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Official URL: http://www.sfbtr40.de/index.php/de/sommerprogramm-2013

Abstract

An implicit-explicit Runge-Kutta method is implemented in the DLR-TAU code to improve the time integration procedure when performing time-accurate simulations like Detached-Eddy Simulation of high Reynolds number turbulent flows. The idea is to avoid the use of the standard dual time stepping approach and instead use an explicit Runge-Kutta scheme in most parts of the grids where the stable time step size is in the order of the physical time scale to resolve the large eddies. In the boundary layers where the underlying RANS model allows for highly stretched grids the local time step reduces significantly. Therefore, fluxes along wall-normal lines are treated implicitly by the time integration scheme. The implicit-explicit scheme together with the error estimation approach is presented in detail.

Item URL in elib:https://elib.dlr.de/84428/
Document Type:Conference or Workshop Item (Speech)
Additional Information:Proceedings
Title:Implementing a time-accurate implicit-explicit method with error estimation for compressible flow
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Oßwald, Kaikai.osswald (at) dlr.deUNSPECIFIED
Hannemann, Volkervolker.hannemann (at) dlr.deUNSPECIFIED
Birken, PhilippUniversität Kassel, Institut für MathematikUNSPECIFIED
Date:2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-9
Editors:
EditorsEmailEditor's ORCID iD
Stemmer, ChristianTechnische Universität München, Institut für Aerodynamik und StrömungsmechanikUNSPECIFIED
Adams, N.A.Technische Universität München, Institut für Aerodynamik und StrömungsmechanikUNSPECIFIED
Radespiel, RolfTechnische Universität Braunschweig, Institut für StrömungsmechanikUNSPECIFIED
Sattelmayer, ThomasTechnische Universität München, Lehrstuhl für ThermodynamikUNSPECIFIED
Schröder, WolfgangRWTH Aachen, Aerodynamisches InstitutUNSPECIFIED
Weigand, BernhardUniversität Stuttgart, Institut für Thermodynamik der Luft- und RaumfahrtUNSPECIFIED
Series Name:Summer Program 2013
Status:Published
Keywords:implicit-explicit Runge-Kutta methods, IMEX, RANS, DES, LES, time integration
Event Title:2nd TRR40 Summer Research Program
Event Location:Munich, Germany
Event Type:international Conference
Event Dates:09. Aug. 2013
Organizer:Technische Universität München
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transportation
DLR - Research area:Raumfahrt
DLR - Program:R RP - Space Transportation
DLR - Research theme (Project):R - Raumfahrzeugsysteme - Numerische Verfahren und Simulation (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Oßwald, Kai
Deposited On:29 Nov 2013 10:29
Last Modified:08 May 2014 23:18

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