Comparison of two unstable flow states in turbulent mixed convection

Niehaus, Konstantin A and Mommert, Michael and Schiepel, Daniel and Schmeling, Daniel and Wagner, Claus (2020) Comparison of two unstable flow states in turbulent mixed convection. In: 21st STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics, 142, pp. 543-552. Springer Nature. 21. STAB/DGLR Symposium 2018, 2018-11-06 - 2018-11-07, Darmstadt, Deutschland. doi: 10.1007/978-3-030-25253-3_52. ISBN 978-3-030-25252-6. ISSN 1612-2909.

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Official URL: https://doi.org/10.1007/978-3-030-25253-3_52

Abstract

We present an experimental study focusing on the large- and small-scale structures in turbulent mixed convection. Measurements are conducted at stable conditions and during a reconfiguration event using temperature probes and triggered stereoscopic particle image velocimetry. It is found that the amplitude of the temperature distribution is higher for a state with three Large-Scale Circulations (LSC) than for a state with four LSCs. Furthermore, a correlation analysis of velocity fields measured during a reconfiguration process reveals the change of the dominant LSC mode. However, the mean spatial power distribution computed via a fast Fourier transformation reflects no changes in small-scale flow structures.

Item URL in elib:

https://elib.dlr.de/120454/

Document Type:

Conference or Workshop Item (Speech)

Additional Information:

Print ISBN 978-3-030-25252-6 Online ISBN 978-3-030-25253-3 ISSN-electronic 1860-0824

Title:

Comparison of two unstable flow states in turbulent mixed convection

Authors:

Authors	Institution or Email of Authors	Author's ORCID iD	ORCID Put Code
Niehaus, Konstantin A	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Mommert, Michael	UNSPECIFIED	https://orcid.org/0000-0002-7817-3388	133724915
Schiepel, Daniel	UNSPECIFIED	https://orcid.org/0000-0002-3703-3514	UNSPECIFIED
Schmeling, Daniel	UNSPECIFIED	https://orcid.org/0000-0003-2712-9974	UNSPECIFIED
Wagner, Claus	UNSPECIFIED	https://orcid.org/0000-0003-2273-0568	UNSPECIFIED

Date:

2020

Journal or Publication Title:

21st STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics

Refereed publication:

Yes

Open Access:

Gold Open Access:

In SCOPUS:

Yes

In ISI Web of Science:

Volume:

142

DOI:

10.1007/978-3-030-25253-3_52

Page Range:

pp. 543-552

Editors:

Editors	Email	Editor's ORCID iD	ORCID Put Code
Dillmann, Andreas	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Heller, Gerd	Airbus Bremen	UNSPECIFIED	UNSPECIFIED
Krämer, Ewald	Institut für Aerodynamik und Gasdynamik Universität Stuttgart	UNSPECIFIED	UNSPECIFIED
Wagner, Claus	UNSPECIFIED	https://orcid.org/0000-0003-2273-0568	UNSPECIFIED
Tropea, Cameron	Fachgebiet Strömungslehre und Aerodynamik, TU Darmstadt	UNSPECIFIED	UNSPECIFIED
Jakirlic, Suad	TU Darmstadt	UNSPECIFIED	UNSPECIFIED

Publisher:

Springer Nature

Series Name:

Notes on Numerical Fluid Mechanics and Multidisciplinary Design

ISSN:

1612-2909

ISBN:

978-3-030-25252-6

Status:

Published

Keywords:

mixed convection, generic passenger cabin ventilation, rayleigh-bernard convection, Stereo PIV, flow reconfiguration

Event Title:

21. STAB/DGLR Symposium 2018

Event Location:

Darmstadt, Deutschland

Event Type:

international Conference

Event Start Date:

6 November 2018

Event End Date:

7 November 2018

Organizer:

STAB/DGLR

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 - Next Generation Train III (old)

Location:

Göttingen

Institutes and Institutions:

Institute for Aerodynamics and Flow Technology > Ground Vehicles

Deposited By:

Niehaus, Konstantin A

Deposited On:

04 Dec 2018 12:15

Last Modified:

17 Feb 2025 14:32

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