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Large-Scale Flow Visualization and Particle Image Velocimetry in Convective Airflow
Resagk, Christian and du Puits, Ronald and Thess, André and Raffel, Markus and Bosbach, Johannes and 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.
Full text not available from this repository.
Official URL: http://www.ode-web.demon.co.uk/11isfv/
Abstract
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.
| Document Type: | Conference or Workshop Item (Speech, Paper) | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Title: | Large-Scale Flow Visualization and Particle Image Velocimetry in Convective Airflow | ||||||||||||||
| Authors: |
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| Date: | 09 August 2004 | ||||||||||||||
| Journal or Publication Title: | 11th International Symposium on Flow Visualization | ||||||||||||||
| Refereed publication: | No | ||||||||||||||
| In SCOPUS: | No | ||||||||||||||
| In ISI Web of Science: | No | ||||||||||||||
| Editors: |
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| Status: | Published | ||||||||||||||
| Keywords: | rayleigh-benard, convection, PIV, flow visualization, helium filled soap bubbles | ||||||||||||||
| Event Title: | 11th International Symposium on Flow Visualization | ||||||||||||||
| Event Location: | University of Notre Dame, Notre Dame, Indiana, USA | ||||||||||||||
| Event Type: | international Conference | ||||||||||||||
| Event Dates: | 2004-08-09 - 2004-08-12 | ||||||||||||||
| HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||
| HGF - Program: | Aeronautics | ||||||||||||||
| HGF - Program Themes: | L - no assignement | ||||||||||||||
| DLR - Research area: | Aeronautics | ||||||||||||||
| DLR - Program: | L - no assignement | ||||||||||||||
| DLR - Research theme (Project): | ["eprint_fieldopt_dlr_project_search_L000" not defined] | ||||||||||||||
| Location: | Göttingen | ||||||||||||||
| Institutes and Institutions: | Institute of Aerodynamics and Flow Technology > Helicopters | ||||||||||||||
| Deposited By: | Dr.rer.nat. Johannes Bosbach | ||||||||||||||
| Deposited On: | 24 Jan 2006 | ||||||||||||||
| Last Modified: | 27 Apr 2009 04:55 |
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