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DNS and LES of turbulent mixed convection in the minimal flow unit

Kath, Christian and Wagner, Claus (2014) DNS and LES of turbulent mixed convection in the minimal flow unit. In: New Results in Numerical and Experimental Fluid Mechanics IX Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 124. Springer Verlag, Cham Heidelberg New York Dordrecht London. pp. 123-131. ISBN 978-3-319-03157-6. ISSN 1612-2909

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Official URL: http://link.springer.com/chapter/10.1007/978-3-319-03158-3_13

Abstract

We performed Direct Numerical Simulations (DNS) and Large Eddy Simulation (LES) of turbulent mixed convection in the minimal flow unit. DNS of turbulent isothermal channel flow have been conducted to demonstrate the predictive capability of the second order accurate finite volume method we used. For the mixed convection case we obtained that the turbulence intensity increases due to bouyancy. Consequently, we reduced the spanwise width of the domain to show that turbulence can be sustained for mixed convection. Additionally, we launched a LES of mixed convection with the dynamic Smagorinsky model. The obtained LES results agree well with the corresponding DNS data.

Item URL in elib:https://elib.dlr.de/78675/
Document Type:Contribution to a Collection
Additional Information:DOI: 10.1007/978-3-319-03158-3_13, Online ISBN: 978-3-319-03158-3, ISSN 1860-0824 (electronic), Library of Congress Control Number: 2013957123
Title:DNS and LES of turbulent mixed convection in the minimal flow unit
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kath, Christianchristian.kath (at) dlr.deUNSPECIFIED
Wagner, Clausclaus.wagner (at) dlr.deUNSPECIFIED
Date:2014
Journal or Publication Title:New Results in Numerical and Experimental Fluid Mechanics IX
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:124
Page Range:pp. 123-131
Editors:
EditorsEmail
Dillmann, AndreasDLR
Heller, GerdAirbus Deutschland
Krämer, EwaldUni Stuttgart
Kreplin, Hans-PeterDLR
Nitsche, WolfgangTU Berlin
Rist, UlrichUni Stuttgart
Publisher:Springer Verlag, Cham Heidelberg New York Dordrecht London
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
ISSN:1612-2909
ISBN:978-3-319-03157-6
Status:Published
Keywords:Direct Numerical Simulation, Large Eddy Simulation, turbulent mixed convection, minimal flow unit, coherent structures, low-speed streak
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Project Next Generation Train II (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Fluid Systems
Deposited By: Kath, Christian
Deposited On:18 Mar 2014 14:11
Last Modified:18 Mar 2014 14:11

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