Chemical Engineering and Processing, ( ISI ), Volume (141), No (1), Year (2019-7) , Pages (107544-107556)

Title : ( Heat transfer intensification in pin-fin heat sink by changing pin-length/longitudinal-pitch )

Authors: M. Rezaei , M. Khoshvaght Aliabadi , A. A. Abbasian Arani , Seyed Hossein Mazloumi ,

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Abstract

The current investigation analyzes experimentally and numerically the hydrothermal performance of a water-cooled pin-fin heat sink by changing pin-length and longitudinal-pitch. The new designs of heat sinks are named as variable pin-length with low to high arrangement (PL-LH), variable pin-length with high to low arrangement (PL-HL), variable longitudinal-pitch with low to high arrangement (LP-LH), and variable longitudinal-pitch with high to low arrangement (LP-HL). The comparison results show that the numerical results gives reasonable agreement with the experimental data with the maximum percent of error within ±20%. The average augmentation percentages of the friction factor-Nusselt number for the PL-LH, PL-HL, LP-LH, and LP-HL compared with the smooth case are 224%-184%, 246%-214%, 305%-195%, and 349%-203%, respectively. As mentioned, the highest heat transfer enhancements are recorded for the PL-HL, and the LP-HL comes in the second. This implies that adopting the pin-fins with larger pin-length at the entrance region and shorter longitudinal-pitch at the exit region is an effective way to enhance the heat transfer in the heat sink. Finally, the PL-HL presents the best overall hydrothermal performance when compared with the other models. The maximum value of the performance index can be 1.65 when the mass flow rate is 0.00585 kg/s.

Keywords

, Heat sink Pin, fin Variable pin, length Variable longitudinal, pitch
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@article{paperid:1077121,
author = {م. رضایی and م. خوشوقت علی آبادی and A. A. Abbasian Arani and Mazloumi, Seyed Hossein},
title = {Heat transfer intensification in pin-fin heat sink by changing pin-length/longitudinal-pitch},
journal = {Chemical Engineering and Processing},
year = {2019},
volume = {141},
number = {1},
month = {July},
issn = {0255-2701},
pages = {107544--107556},
numpages = {12},
keywords = {Heat sink Pin-fin Variable pin-length Variable longitudinal-pitch},
}

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%0 Journal Article
%T Heat transfer intensification in pin-fin heat sink by changing pin-length/longitudinal-pitch
%A م. رضایی
%A م. خوشوقت علی آبادی
%A A. A. Abbasian Arani
%A Mazloumi, Seyed Hossein
%J Chemical Engineering and Processing
%@ 0255-2701
%D 2019

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