An entropy generation minimization, EGM, method is applied to study the thermodynamic losses caused by heat transfer and pressure drop for the fluid in a cylindrical pin-fin heat sink and bypass flow regions. A general expression for the entropy generation rate is obtained by considering control volumes around heat sink and bypass regions. The conservation equations for mass and energy with the entropy balance are applied in both regions. Inside the heat sink, analytical/empirical correlations are used for heat transfer coefficients and friction factors, where the reference velocity used in Reynolds number and pressure drop is based on the minimum free area available for the fluid flow. In bypass regions theoretical models, based on laws of conservation of mass, momentum and energy, are used to predict flow velocity and pressure drop. Both in-line and staggered arrangements are studied and their relative performance is compared for the same thermal and hydraulic conditions. A parametric study is also performed to show the effects of bypass on the overall performance of heat sinks.
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ASME 2007 InterPACK Conference collocated with the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference
July 8–12, 2007
Vancouver, British Columbia, Canada
Conference Sponsors:
- Electronic and Photonic Packaging Division
ISBN:
0-7918-4277-0
PROCEEDINGS PAPER
Optimization of Pin-Fin Heat Sinks in Bypass Flow Using Entropy Generation Minimization Method
Waqar A. Khan,
Waqar A. Khan
CIIT - Abbottabad, Abbottabad, NWFP, Pakistan
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Michael M. Yovanovich
Michael M. Yovanovich
University of Waterloo, Waterloo, ON, Canada
Search for other works by this author on:
Waqar A. Khan
CIIT - Abbottabad, Abbottabad, NWFP, Pakistan
Michael M. Yovanovich
University of Waterloo, Waterloo, ON, Canada
Paper No:
IPACK2007-33983, pp. 653-661; 9 pages
Published Online:
January 8, 2010
Citation
Khan, WA, & Yovanovich, MM. "Optimization of Pin-Fin Heat Sinks in Bypass Flow Using Entropy Generation Minimization Method." Proceedings of the ASME 2007 InterPACK Conference collocated with the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference. ASME 2007 InterPACK Conference, Volume 1. Vancouver, British Columbia, Canada. July 8–12, 2007. pp. 653-661. ASME. https://doi.org/10.1115/IPACK2007-33983
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