Journal of Electronics Cooling and Thermal Control

Volume 4, Issue 3 (September 2014)

ISSN Print: 2162-6162   ISSN Online: 2162-6170

Google-based Impact Factor: 0.52  Citations  

Heat Transfer Characteristics of Square Micro Pin Fins under Natural Convection

HTML  Download Download as PDF (Size: 3154KB)  PP. 59-69  
DOI: 10.4236/jectc.2014.43007    5,009 Downloads   6,471 Views   Citations

ABSTRACT

In order to comply with the recent demand for downsizing of the electric equipment, the minia- turization and the improvement in heat transfer performance of a heat sink under natural air-cooling are increasingly required. This paper describes the experimental and numerical investigations of heat sinks with miniature/micro pins and the effect of the pin size, pin height and the number of pins on heat transfer characteristics of heat sinks. Five types of basic heat sink models are investigated in this study. The whole heat transfer area of heat sinks having the different pin size, pin height and the number of pins respectively is kept constant. From a series of experiments and numerical analyses, it has been clarified that the heat sink temperature rises with increase in the number of pins. That is, the heat sink with miniaturized fine pins showed almost no effect on the heat transfer enhancement. This is because of the choking phenomenon occurred in the air space among the pin fins. Reflecting these results, it is confirmed that the heat transfer coefficient reduces with miniaturization of pins. Concerning the effects of the heat transfer area on the heat sink performance, almost the same tendency has been observed in other three series of large surface area, that is, higher pin height. Furthermore as a result of studying non-dimensional convection heat transfer performance, it was found that the relation between the Nusselt number (Nu) and the Rayleight number (Ra) is given by Nu = 0.16 Ra0.52.

Cite this paper

Matsumoto, N. , Tomimura, T. and Koito, Y. (2014) Heat Transfer Characteristics of Square Micro Pin Fins under Natural Convection. Journal of Electronics Cooling and Thermal Control, 4, 59-69. doi: 10.4236/jectc.2014.43007.

Cited by

[1] Performance Improvement of Photovoltaic Module Using an Air-Cooling Micro Finned Heat Sink
2020
[2] Experimental Investigations of Enhanced Micro Structured Heat Sinks
2020
[3] شبیه سازی عددی و مطالعه پارامتری انتقال گرمای جابجایی در یک چاه گرمایی میکروکانالی با پره های پین شده بیضوی‎
2020
[4] EM ENGENHARIA MECÂNICA
2020
[5] Numerical study of fin geometry on the heat transfer characteristics of 72 V ECU heatsink for an electric three-wheeler
2019
[6] Comparison of heat sink and water type PV/T collector for polycrystalline photovoltaic panel cooling
Renewable Energy, 2018
[7] Thermoelectric System Modeling and Design
2017
[8] Constructal heat transfer rate maximization for cylindrical pin-fin heat sinks
Applied Thermal Engineering, 2016
[9] Numerical study and optimizing on micro square pin-fin heat sink for electronic cooling
Applied Thermal Engineering, 2015
[10] Numerical Simulation and Parametric Study of the Convection Heat Transfer in a Micro-Channel Heat Sink with the Elliptical Pin Fins

Copyright © 2020 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.