Insights into two-phase flow dynamics in closed-loop pulsating heat pipes utilizing Fe
Journal article
Goshayeshi, H.R., Mousavi, S.B., Heris, S.Z. and Chaer, I. (2024). Insights into two-phase flow dynamics in closed-loop pulsating heat pipes utilizing Fe. Scientific Reports. 14 (1), p. 16497. https://doi.org/10.1038/s41598-024-67637-y
Authors | Goshayeshi, H.R., Mousavi, S.B., Heris, S.Z. and Chaer, I. |
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Abstract | This article discusses a focused study on visualizing the flow patterns in a two-phase pulsating heat pipe (PHP) using Fe O /water as the working fluid at 3 V/V% concentration. The research also aims to meticulously examine phase change phenomena in the heating section, particularly focusing on bubble formation and expansion processes. A high-speed video camera was utilized to capture dynamic insights into the behavior of the Fe O /water mixture. Based on the findings, a straightforward model was developed to explain bubble generation and growth in the mixture, serving as a useful reference for future PHP designs and optimizations. Visual observations also noted the stable nature of the Fe O /water nanofluid over a 4-day period, confirming its consistency throughout the experiments. Moreover, the impact of heat load variation on the evaporator section was assessed using controlled heat inputs ranging from 10 to 80 W. Observations on the arrangement of slugs and plugs at a 50% filling ratio revealed interesting self-adjusting flow patterns in response to increasing heat inputs, providing valuable insights into PHP operational dynamics. Notably, the oscillatory flow behavior of Fe O /water, the chosen working fluid, exhibited greater activity in comparison to water. This distinctive flow behavior contributed to achieving heightened thermal performance efficiency for the Fe O /water system, attributed to its faster attainment of the annular flow condition. [Abstract copyright: © 2024. The Author(s).] |
Keywords | Liquid slug; Flow oscillating; Pulsating heat pipes (PHP); Two-phase flow patterns; Vapor plug |
Year | 2024 |
Journal | Scientific Reports |
Journal citation | 14 (1), p. 16497 |
Publisher | Nature Research |
ISSN | 2045-2322 |
Digital Object Identifier (DOI) | https://doi.org/10.1038/s41598-024-67637-y |
Web address (URL) | https://www.nature.com/articles/s41598-024-67637-y |
Publication dates | |
Online | 17 Jul 2024 |
Publication process dates | |
Accepted | 15 Jul 2024 |
Deposited | 31 Jul 2024 |
Publisher's version | License File Access Level Open |
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https://openresearch.lsbu.ac.uk/item/97wyw
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