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NUMERICAL STUDY OF COOLING ENHANCEMENT: HEAT SINK WITH HOLLOW PERFORATED ELLIPTIC PIN FINS

Volume 8, Issue 5, 2016, pp. 409-428
DOI: 10.1615/ComputThermalScien.2016017354
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ABSTRACT

A mixed convective heat transfer in hollow perforated pin fins array with inline arrangement subject to a vertical impinging flow is numerically investigated. The governing equations based on Navier−Stokes equations are solved by adopting a three-dimensional finite volume numerical model. The target heat sink is tailored on the basis of the experimental work of Deshmukh and Warkhedkar [Exp. Therm. Fluid Sci., vol. 50, pp. 61−68,2013]. Hence, the elliptic solid pin fin without perforation is preliminarily considered to validate the numerical procedure. The aim is to assess the thermal performance of the new heat sink (perforated pin fins) under several significant parameters such as geometrical position of the hole (ht = 10, 20, 30, 40 mm) and the Reynolds number (Re = 50−500). The effects of the height of the horizontal hole and the vertical perforation on the thermal dissipation rate and the pressure drop are explicitly undertaken and compared to the standard configuration (without perforation). It is shown that the optimal value of the geometrical coordinate of the hole is found at about ht = 10 mm, which enhances heat dissipation positively and consequently ensures a good cooling process of the system.

CITED BY
  1. Bakhti Fatima Zohra, Si-Ameur Mohamed, A comparison of mixed convective heat transfer performance of nanofluids cooled heat sink with circular perforated pin fin, Applied Thermal Engineering, 159, 2019. Crossref

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