Analytical models for both unlooped and looped Pulsating Heat Pipes (PHPs) with multiple liquid slugs and vapor plugs are presented in this study. The governing equations are solved using an explicit finite difference scheme to predict the behavior of vapor plugs and liquid slugs. The results show that the effect of gravity on the performance of top heat mode unlooped PHP is insignificant. The effects of diameter, charge ratio, and heating wall temperature on the performance of looped and unlooped PHPs are also investigated. The results also show that heat transfer in both looped and unlooped PHPs is due mainly to the exchange of sensible heat.
Thermal Modeling of Unlooped and Looped Pulsating Heat Pipes
Contributed by the Heat Transfer Division for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received by the Heat Transfer Division July 11, 2000; revision received May 30, 2001. Associate Editor: J. Georgiadis.
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Shafii , M. B., Faghri, A., and Zhang, Y. (May 30, 2001). "Thermal Modeling of Unlooped and Looped Pulsating Heat Pipes ." ASME. J. Heat Transfer. December 2001; 123(6): 1159–1172. https://doi.org/10.1115/1.1409266
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