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Reformulation of a two-equation model for the turbulent heat transfer

Rochhausen, Stefan (2012) Reformulation of a two-equation model for the turbulent heat transfer. Turbulence, Heat and Mass Transfer 7, Palermo, Italien.

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Abstract

In this paper a model for the turbulent heat transport is developed. The model is based on equations proposed by Nagano and reformulated by the introduction of a specific dissipation rate. Closure coefficients for destruction source terms are derived by assuming a constant time-scale ratio for thermal and velocity fluctuations in homogenous decaying turbulence. Production modelling constants are calibrated in the thermal mixing layer and flat plate viscous boundary layer. The introduction of a specific dissipation rate makes the use of a wall damping function unnecessary. This is advantageous in separated flows. Simulation results of the backward facing step show a more accurate prediction of heat transfer coefficient compared to constant turbulent Prandtl number calculation. The model has been calibrated and applied with the Menter-SST model .

Item URL in elib:https://elib.dlr.de/81002/
Document Type:Conference or Workshop Item (Paper)
Title:Reformulation of a two-equation model for the turbulent heat transfer
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Rochhausen, StefanAT-NUM, stefan.rochhausen (at) dlr.deUNSPECIFIED
Date:1 September 2012
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:turbulent heat transfer, two-equation turbulence modelling
Event Title:Turbulence, Heat and Mass Transfer 7
Event Location:Palermo, Italien
Event Type:international Conference
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion and Use (old)
HGF - Program Themes:Power Plants (old)
DLR - Research area:Energy
DLR - Program:E VG - Combustion and Gas Turbine Technologies
DLR - Research theme (Project):E - Gasturbine (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Numerical Methodes
Deposited By: Rochhausen, Stefan
Deposited On:05 Feb 2013 09:13
Last Modified:12 Dec 2013 21:59

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