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Interactions of Liquid Plugs in a Pulsating Heat Pipe

[+] Author Affiliations
Wei Qu, Yan Zhou

Chinese Academy of Sciences, Beijing, China

Chong Qu

Ludong University, Yantai, China

Paper No. MicroNano2008-70315, pp. 437-441; 5 pages
doi:10.1115/MicroNano2008-70315
From:
  • 2008 Second International Conference on Integration and Commercialization of Micro and Nanosystems
  • 2008 Second International Conference on Integration and Commercialization of Micro and Nanosystems
  • Clear Water Bay, Kowloon, Hong Kong, June 3–5, 2008
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4294-0 | eISBN: 0-7918-3819-6
  • Copyright © 2008 by ASME

abstract

The interactions of two plugs in a pulsating heat pipe are important to mechanism and operation of the multi-plugs. Based on the experimental observation, the control volume of a pulsating heat pipe with two capillary passages and two liquid plugs is modeled. The operations of the two liquid plugs were described and solved by differential equations. The loci and velocities of the oscillating and moving liquid plugs were obtained. The results show that the bigger capillary diameter, the lower filling rate, the higher heating power and the initial stronger perturbations can all lead to faster movement of the liquid plugs, and it is better to the heat transfer. When the heating power is lower, the liquid plugs do not coalesce. While if the heating power is higher, then the liquid plugs may coalesce, further to form the single liquid plugs or the circular flow pattern. The results can explain the experimental visualizations qualitatively the interactions between the liquid plugs.

Copyright © 2008 by ASME
Topics: Heat pipes

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