Large-scale coherent structure dynamics and heat transport in turbulent mixed convective air

Westhoff, Andreas and Bosbach, Johannes and Wagner, Claus (2014) Large-scale coherent structure dynamics and heat transport in turbulent mixed convective air. 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. 285-292. doi: 10.1007/978-3-319-03158-3_29. 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_29

Abstract

We report on an experimental study of mixed convective air flow in a cuboidal container with an inlet and outlet slot at Ar = 3.3, Re = 1.0 × 10^4, Ra = 2.4×10^8 at a fluid pressure of P = 11.6 bar. Particle image velocimetry were performed with the objective to identify the dynamics of the large-scale circulations. In addition, we applied temperature measurements to determine the heat transport. Due to the unsteady nature of mixed convection in the present configuration, the velocity vector fields were subjected to a proper orthogonal decomposition in order to extract the predominant coherent structures. The analysis uncovers two structures consisting of three and four thermally induced large-scale circulations, which are arranged in longitudinal direction. Further, we found that the dynamics and the topology of the convection rolls strongly influences the heat transport between the container‘s inlet and outlet.

Item URL in elib:

https://elib.dlr.de/79335/

Document Type:

Contribution to a Collection

Additional Information:

DOI: 10.1007/978-3-319-03158-3_29; ISSN: 1860-0824 (electronic); ISBN 978-3-319-03158-3: (eBook); Library of Congress Control Number: 2013957123

Title:

Large-scale coherent structure dynamics and heat transport in turbulent mixed convective air

Authors:

Authors	Institution or Email of Authors	Author's ORCID iD	ORCID Put Code
Westhoff, Andreas	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Bosbach, Johannes	UNSPECIFIED	https://orcid.org/0000-0002-1531-127X	155242626
Wagner, Claus	UNSPECIFIED	https://orcid.org/0000-0003-2273-0568	UNSPECIFIED

Date:

2014

Journal or Publication Title:

New Results in Numerical and Experimental Fluid Mechanics IX

Refereed publication:

Yes

Open Access:

Gold Open Access:

In SCOPUS:

In ISI Web of Science:

Volume:

124

DOI:

10.1007/978-3-319-03158-3_29

Page Range:

pp. 285-292

Editors:

Editors	Email	Editor's ORCID iD	ORCID Put Code
Dillmann, Andreas	DLR	UNSPECIFIED	UNSPECIFIED
Heller, Gerd	Airbus Deutschalnd	UNSPECIFIED	UNSPECIFIED
Krämer, Ewald	Uni Stuttgart	UNSPECIFIED	UNSPECIFIED
Kreplin, Hans-Peter	DLR	UNSPECIFIED	UNSPECIFIED
Nitsche, Wolfgang	TU Berlin	UNSPECIFIED	UNSPECIFIED
Rist, Ulrich	Uni Stuttgart	UNSPECIFIED	UNSPECIFIED

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:

turbulent mixed convection, proper orthogonal decomposition, coherent structures, large-scale circulation, heat transport

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:

Westhoff, Andreas

Deposited On:

26 Mar 2014 13:32

Last Modified:

18 Mar 2024 11:56

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