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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, 6.-7. Nov. 2018, 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/ | |||||||||||||||||||||
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| 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: |
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| Date: | 2020 | |||||||||||||||||||||
| Journal or Publication Title: | 21st STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics | |||||||||||||||||||||
| Refereed publication: | Yes | |||||||||||||||||||||
| Open Access: | No | |||||||||||||||||||||
| Gold Open Access: | No | |||||||||||||||||||||
| In SCOPUS: | Yes | |||||||||||||||||||||
| In ISI Web of Science: | No | |||||||||||||||||||||
| Volume: | 142 | |||||||||||||||||||||
| DOI : | 10.1007/978-3-030-25253-3_52 | |||||||||||||||||||||
| Page Range: | pp. 543-552 | |||||||||||||||||||||
| Editors: |
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| 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 Dates: | 6.-7. Nov. 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: | 18 Jun 2020 09:49 |
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