Analysis of pulsating heat pipe with capillary wick and varying channel diameter

Analysis of pulsating heat pipe with capillary wick and varying channel diameter Variation in channel diameter is investigated as a means of enhancing heat transfer in a pulsating heat pipe with capillary wick using the model presented here. The model is one-dimensional with slug flow where the momentum equation is solved for each liquid slug. The number and mass of liquid slugs are allowed to vary throughout a simulation. The energy equation is solved both in the wall and wick and in the working fluid. The effects of diameter profile, gravity, fill ratio, and heating and cooling schemes can be studied with the model. Results yield similar trends to what has been experimentally observed. Results also indicate that heat transfer can be enhanced when the diameter of the channel is varied along the channel length, thereby providing increased range of heat load capability, less sensitivity to gravity, and in some cases smaller temperature differentials. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Heat and Mass Transfer Elsevier

Analysis of pulsating heat pipe with capillary wick and varying channel diameter

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Publisher
Elsevier
Copyright
Copyright © 2005 Elsevier Ltd
ISSN
0017-9310
eISSN
1879-2189
D.O.I.
10.1016/j.ijheatmasstransfer.2005.01.013
Publisher site
See Article on Publisher Site

Abstract

Variation in channel diameter is investigated as a means of enhancing heat transfer in a pulsating heat pipe with capillary wick using the model presented here. The model is one-dimensional with slug flow where the momentum equation is solved for each liquid slug. The number and mass of liquid slugs are allowed to vary throughout a simulation. The energy equation is solved both in the wall and wick and in the working fluid. The effects of diameter profile, gravity, fill ratio, and heating and cooling schemes can be studied with the model. Results yield similar trends to what has been experimentally observed. Results also indicate that heat transfer can be enhanced when the diameter of the channel is varied along the channel length, thereby providing increased range of heat load capability, less sensitivity to gravity, and in some cases smaller temperature differentials.

Journal

International Journal of Heat and Mass TransferElsevier

Published: Jun 1, 2005

References

  • Viscous fluid flow
    White, F.M.

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