NDLI: A Suggestion on Heat Sink Simplification on Natural Convection

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Kim, Won Nyun Kim, Choong Ki
Copyright Year	2003
Abstract	Heat sink is commonly found in electronic systems. For its optimization, numerical computation is introduced. However, narrow gaps between the fins of heat sink have been a troubling factor. That increases the number of grid excessively, and results in increased computation time. The quality of grid can be poor and that halt the accuracy of computed numerical solution. To avoid these problems, many simplification methods are proposed by simplifying complex heat sink. The most popular example is regarding the array of fins as flow resistance from hydraulic point of view and working fluid with different thermal conductivity for thermal equivalence [1]. Its thermal conductivity can be determined according to well-known relationship between Nu, Re, and Pr (see [2, 3]). This simplification presents many advantages but it is not applicable to natural convection. In this paper, a modified model is suggested to extend the simplification to natural convection, which is still popularly applied to electro cooling systems. With the results of [4], thermal conductivity of flow resistance region is iteratively. The modified model is verified by computing flow and thermal fields of PDP. Applying this model to fanless PDP, the number of total grid is reduced by 38.5% percents and corresponding computation time was saved while the accuracy of computed solution is kept undamaged.
Sponsorship	Heat Transfer Division
Starting Page	551
Ending Page	556
Page Count	6
File Format	PDF
ISBN	0791836959
DOI	10.1115/HT2003-47481
e-ISBN	0791836797
Volume Number	Heat Transfer: Volume 3
Conference Proceedings	ASME 2003 Heat Transfer Summer Conference
Language	English
Publisher Date	2003-07-21
Publisher Place	Las Vegas, Nevada, USA
Access Restriction	Subscribed
Subject Keyword	Fluids Electronic systems Computation Thermal conductivity Fins Cooling systems Natural convection Heat sinks Flow (dynamics) Optimization
Content Type	Text
Resource Type	Article

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