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Geometrical Effects in Optimal Performance of Energy Dissipation of Pin Fin Heat Sinks

[+] Author Affiliations
J. L. Zúñiga-Cerroblanco, A. Hernández-Guerrero, J. C. Rubio-Arana

Universidad de Guanajuato, Salamanca, GTO, México

G. J. Kowalski

Northeastern University, Boston, MA

Paper No. IMECE2009-11186, pp. 1077-1085; 9 pages
doi:10.1115/IMECE2009-11186
From:
  • ASME 2009 International Mechanical Engineering Congress and Exposition
  • Volume 9: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B and C
  • Lake Buena Vista, Florida, USA, November 13–19, 2009
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4382-6 | eISBN: 978-0-7918-3863-1
  • Copyright © 2009 by ASME

abstract

This work describes the hydraulic and thermal behavior of pin-fin heat sinks when subjected to a constant heat flux with values equivalent to those generated incurrent electronic devices. The fin geometries analyzed are rectangular, circular and elliptical. The experimental analysis is performed for pin-fin in-line arrangement. The heat sink arrangement is also analyzed numerically for pin-fin in-line and staggered arrangements; and the results are compared. The thermal resistance and pressure drop is reported for all arrangements for different air velocities. The experimental and numerical results are compared and validated with recent technical literature. The Entropy Generation Minimization (EGM) is used to obtain an optimization of the heat sink pin fin arrangement. Analytical and empirical correlations for heat transfer coefficients and friction factors are used in the optimization model. This optimization model considers all relevant design parameters for pin-fin heat sinks, including geometric parameters, material properties and flow.

Copyright © 2009 by ASME

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