Characteristics Of The Entry Flow Field In An Open Thermosyphon
Price
Free (open access)
Transaction
Volume
12
Pages
11
Published
1996
Size
795 kb
Paper DOI
10.2495/HT960091
Copyright
WIT Press
Author(s)
Y. Weiss, M. Szanto, I. Shai & G. Ben-Dor
Abstract
In the present work we focus our attention on the inlet region of the thermosyphon tube, closed at the bottom and open at the top to a cold reservoir. It will be shown that the inlet flow characteristics play an important role, in the ability of the device to remove heat from the tube walls. A numerical simulation of the complete flow field, under turbulent conditions, was conducted using the finite element method. Verification of the simulated flow field was obtained by visualization experiments in a scaled apparatus. It was found that under certain conditions the cold fluid from the reservoir does not penetrate into the tube's core. Actually an enhanced mixing heat transfer process takes place at the boundary between the tube and the reservoir, caus
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