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Experimental and CFD analysis of heat sinks with base plate for CPU cooling

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Abstract

Experimental and theoretical investigations of the thermal performance of a variety of heat sinks have been made. The heat sinks investigated were: straight finned, elliptical finned, small pin finned, circular disc finned, elliptical disc finned, frustum finned and double base straight finned. Realistic, manufacturable geometries are considered for minimizing thermal resistance at low velocity. The experimental results of several of the simple geometry heat sinks have been compared to those predicted by a commercially available computational fluid dynamics code fluent. The parameters such as fin geometry, fin pitch and fin height are optimized primarily in this paper and a second task is carried out to optimize base plate thicknesses, base plate materials and modify design of heat sink for improving the thermal performance in the next generation. Although the performance of heat sink is good, the temperature of heat sink at center is high. In this research work, the best heat sink geometry is selected and modified in order to reduce maximum temperature distribution and hot spots of heat sink at center by changing the geometry design and adding one more base. It is observed that flow obstructions in the chassis and the resulting air recirculation affect the heat sink temperature distribution.

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Authors and Affiliations

  1. Faculty of Mechanical Engineering, Sona College of Technology, Salem, Tamilnadu, India

    R. Mohan

  2. Principal, Sona College of Technology, Salem, Tamilnadu, India

    P. Govindarajan

Authors
  1. R. Mohan
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  2. P. Govindarajan
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Correspondence to R. Mohan.

Additional information

This paper was recommended for publication in revised form by Associate Editor Dae Hee Lee

P. Govindarajan received the B.Sc (Maths) degree from Madras University in 1966. The B.E and M.Sc (Heat Power Engineering) degrees from Madras university, India in 1969 and 1972 and Ph.D in Mechanical Engineering from I.I.T Kharagpur in 1983. He is principal at Sona college of Technology, Tamil Nadu, India. He was a staff member in mechanical engineering at Government college of Engineering, Tamil Nadu, India. His research interests are gas turbine combustion, heat transfer applications, solar Energy, I.C Engines.

R. Mohan received B.E and M.E degrees from Madras and, respectively, Anna University in 2001 and 2005. He is currently doing doctoral works in Mechanical Engineering at Anna University. His research interests are CFD and heat transfer application in Electronics industries.

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Mohan, R., Govindarajan, P. Experimental and CFD analysis of heat sinks with base plate for CPU cooling. J Mech Sci Technol 25, 2003–2012 (2011). https://doi.org/10.1007/s12206-011-0531-8

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  • DOI: https://doi.org/10.1007/s12206-011-0531-8

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