Resagk, Christian und du Puits, Ronald und Thess, André und Raffel, Markus und Bosbach, Johannes und Aroussi, Abdelwahab (2004) Large-Scale Flow Visualization and Particle Image Velocimetry in Convective Airflow. In: 11th International Symposium on Flow Visualization. 11th International Symposium on Flow Visualization, 2004-08-09 - 2004-08-12, University of Notre Dame, Notre Dame, Indiana, USA.
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Offizielle URL: http://www.ode-web.demon.co.uk/11isfv/
Kurzfassung
We report about the characterization of the flow structure in a large-scale Rayleigh-Bénard (RB) experiment in which a fluid is heated from below and cooled from above. The cylindrical convection cell filled with air has a diameter of 7.1m and a variable height between 0 and 6.30m. At an aspect ratio (A) of 2 theoretical simulations of the mean velocity field (wind) and the velocity profile measurements predict a transition of a single 2d roll structure into a 3d multi-roll structure. Our stereo PIV measurements at A=2 in a light sheet plain of 4m x 3.5m show in agreement with these predictions various 2d and 3d large-scale velocity field structures. For seeding the convection flow Helium filled soap bubbles from a multi-channel bubble generator are used. These measurements in the large convections cell, based on large-scale PIV investigations of forced convection flows in large laboratories demonstrate the successful application of highly developed PIV techniques in strongly turbulent 3d flows in measurement areas larger than 3.5m x 3.5m.
elib-URL des Eintrags: | https://elib.dlr.de/21610/ | ||||||||||||||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag, Paper) | ||||||||||||||||||||||||||||
Titel: | Large-Scale Flow Visualization and Particle Image Velocimetry in Convective Airflow | ||||||||||||||||||||||||||||
Autoren: |
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Datum: | 9 August 2004 | ||||||||||||||||||||||||||||
Erschienen in: | 11th International Symposium on Flow Visualization | ||||||||||||||||||||||||||||
Referierte Publikation: | Nein | ||||||||||||||||||||||||||||
Open Access: | Nein | ||||||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||||||
In SCOPUS: | Nein | ||||||||||||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||||||||||||
Herausgeber: |
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Status: | veröffentlicht | ||||||||||||||||||||||||||||
Stichwörter: | rayleigh-benard, convection, PIV, flow visualization, helium filled soap bubbles | ||||||||||||||||||||||||||||
Veranstaltungstitel: | 11th International Symposium on Flow Visualization | ||||||||||||||||||||||||||||
Veranstaltungsort: | University of Notre Dame, Notre Dame, Indiana, USA | ||||||||||||||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||||||||||||||
Veranstaltungsdatum: | 2004-08-09 - 2004-08-12 | ||||||||||||||||||||||||||||
HGF - Forschungsbereich: | Verkehr und Weltraum (alt) | ||||||||||||||||||||||||||||
HGF - Programm: | Luftfahrt | ||||||||||||||||||||||||||||
HGF - Programmthema: | keine Zuordnung | ||||||||||||||||||||||||||||
DLR - Schwerpunkt: | Luftfahrt | ||||||||||||||||||||||||||||
DLR - Forschungsgebiet: | L - keine Zuordnung | ||||||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | L - keine Zuordnung (alt) | ||||||||||||||||||||||||||||
Standort: | Göttingen | ||||||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Aerodynamik und Strömungstechnik > Hubschrauber | ||||||||||||||||||||||||||||
Hinterlegt von: | Bosbach, Dr.rer.nat. Johannes | ||||||||||||||||||||||||||||
Hinterlegt am: | 24 Jan 2006 | ||||||||||||||||||||||||||||
Letzte Änderung: | 27 Apr 2009 04:55 |
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