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Conservative segregated solution method for turbulence model equations in compressible flows

Morsbach, Christian and di Mare, Francesca (2012) Conservative segregated solution method for turbulence model equations in compressible flows. 6th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2012), 10.-14.09.2012, Wien, Österreich.

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Abstract

A robust and accurate solution technique is required for the routine and reliable use of Reynolds-averaged Navier-Stokes (RANS) methods based on sophisticated turbulence models such as Reynolds Stress Transport Models (RSTM). A segregated solution method is preferred in view of code modularity and performance. In a density-based procedure, conservation errors can lead to stability problems if a turbulence model is solved in a segregated manner. In order to avoid these problems, a correction to the scalar convective fluxes has been derived which restores full consistency with the discretisation of the corresponding terms in the Navier-Stokes equations and achieves proper conservation of the transported scalar quantities. The method has been successfully implemented in the DLR CFD solver TRACE and validated using a standard Linear Eddy Viscosity Model (LEVM). With an appropriately chosen slope limiter, stable solutions have been obtained for RSTM computations. This enables the application of RSTMs to complex flows without the additional efforts of a fully coupled solution method.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Conservative segregated solution method for turbulence model equations in compressible flows
Authors:
AuthorsInstitution or Email of Authors
Morsbach, ChristianDLR, Institute of Propulsion Technology
di Mare, FrancescaDLR, Institute of Propulsion Technology
Date:2012
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Status:Accepted
Keywords:numerical methods, density-based, conservation properties, RANS, turbulence modelling
Event Title:6th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2012)
Event Location:Wien, Österreich
Event Type:international Conference
Event Dates:10.-14.09.2012
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignement
DLR - Research theme (Project):L -- no assignement
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Numerical Methodes
Deposited By: Christian Morsbach
Deposited On:09 Jul 2012 09:35
Last Modified:09 Jul 2012 09:35

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