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Experimental and numerical investigations of a single turn pulsating heat pipe using distilled water including micro-coppers

Mihandoust, A ; Sharif University of Technology | 2023

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  1. Type of Document: Article
  2. DOI: 10.1007/s00231-022-03338-4
  3. Publisher: Springer Science and Business Media Deutschland GmbH , 2023
  4. Abstract:
  5. In this work, experimental and numerical investigations were performed to evaluate the heat transfer efficiency of a single turn pulsating heat pipe by using distilled water as base fluid and distilled water with micro particles (micro-coppers). The pulsating heat pipe was manufactured with copper capillary tube by choosing the internal and external diameter 4 mm and 6 mm, respectively. The effect of filling ratio (40, 50 and 60%), heat input (20, 30, 40, 50 and 60 W) and concentrations of micro-coppers (0.0625 g ml−1 and 0.125 g ml−1) in distilled water as base fluid were studied. Experimental findings displayed that the thermal resistance of the system using micro-coppers declined with enhancement in the concentration of micro-coppers and filling ratio. Furthermore, utilizing micro-coppers decreased the thermal resistance of the system up to 37.61%. The volume of fluid, K-epsilon, and discrete phase models were used to investigate the system numerically. In the model solution, the pressure velocity coupling was considered as SIMPLE. Momentum, volume fraction and energy were taken as second order upwind. Results from computational fluid dynamics depicted that the thermal conductivity of distilled water and the fluid with micro-coppers is enhanced with an increase in temperature. Finally, a new empirical relation is proposed by present results with the mean deviation of 3.6%. The adjusted R-squared and predicted R-squared of the suggested correlation were 0.976 and 0.948 respectively, which represents reasonable agreement in comparison with experimental results. © 2023, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature
  6. Keywords:
  7. Numerical investigations ; Micro-coppers ; Turn pulsating ; Pulsating heat pipe ; Surface tension coefficient
  8. Source: Heat and Mass Transfer/Waerme- und Stoffuebertragung ; Volume 59, Issue 9 , 2023 , Pages 1601-1619 ; 09477411 (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s00231-022-03338-4