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Analysis of microchannel heat sink performance for electronics cooling based on thermodynamics

Abbassi, H ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. DOI: 10.1115/icnmm2006-96245
  3. Publisher: American Society of Mechanical Engineers , 2006
  4. Abstract:
  5. Present investigation analyzes the issue of entropy generation in a uniformly heated microchannel heat sink (MCHS). Analytical approach used to solve forced convection problem across MCHS, is porous medium model based on modified Darcy equation for fluid flow and two-equation model for heat transfer between solid and fluid phases. Furthermore, closed form solution of velocity distribution is employed to capture z-direction velocity gradient of flow, which plays a salient role on entropy generation through fluid flow. Analytical expressions for total and thermal entropy generation number (stems from heat transfer), and Bejan number are derived and cast into dimensionless form using velocity and temperature distributions. Besides, entropy generation characteristics in MCHS and the impact of various influential parameters on entropy production have been investigated. Finally, In order to examine the accuracy of analysis, the results of thermal evaluation are compared to one of the previous investigations conducted for thermal optimization of MCHS. Copyright © 2006 by ASME
  6. Keywords:
  7. Cooling systems ; Entropy ; Flow of fluids ; Heat transfer ; Microelectronics ; Temperature distribution ; Bejan number ; Thermal entropy generation ; Thermal optimization ; Velocity distribution ; Heat sinks
  8. Source: 4th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM2006, Limerick, 19 June 2006 through 21 June 2006 ; Volume 2006 A , 2006 , Pages 355-362 ; 0791847608 (ISBN); 9780791847602 (ISBN)
  9. URL: https://asmedigitalcollection.asme.org/ICNMM/proceedings-abstract/ICNMM2006/47608/355/322733