Investigation of the influence of free convection on the heat transfer of cylinders with different aspect ratios
Abstract
The heat transfer from an electrically heated cylinder (wire) of finite length to the surrounding fluid can be divided into heat radiation, conduction and convection. A technical application of these cylinders with typical dimensions of 1-2 mm length and a few micrometers diameter is the Hot-Wire-Anemometry. This systematic study should clarify the influence of free convection to three dimensional heat transfer of cylinders. For this aim it is planned to investigate Reynolds numbers below Re=1 (creeping flow). For this reason measurements should be done under 1g in the earth laboratory and also under microgravity (µg) conditions. Comparisons of these measurements under otherwise same conditions allows to distinguish between the pure convection heat transfer and the contributions due to conduction and other effects.
- Publication:
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Journal of Thermal Science
- Pub Date:
- March 2001
- DOI:
- 10.1007/s11630-001-0010-0
- Bibcode:
- 2001JThSc..10...58H
- Keywords:
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- thermal anemometry;
- hot-wire;
- microgravity;
- free convection;
- heat transfer