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Thermal Spreading and Contact Resistance: Fundamentals and Applications
By
Yuri S. Muzychka
Yuri S. Muzychka
Department of Mechanical and Mechatronics Engineering, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John’s, NL, Canada
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M. Michael Yovanovich
M. Michael Yovanovich
University of Waterloo, Department of Mechanical and Mechatronics Engineering, Faculty of Engineering, University of Waterloo, Waterloo, Ontario, Canada
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ISBN:
9781394187522
No. of Pages:
464
Publisher:
ASME
Publication date:
2023

Thermal spreading resistance in finite systems such as heat sinks is often modeled using a uniform conductance in the sink plane. In regards to heat sinks containing fins, this requires that the distribution of fins is both uniform in spacing and height and cooled with a constant convection heat transfer coefficient. In many real applications, this is not achieved due to nonuniform fin heights/spacings and the nature of the supplied cooling using fans. In impingement air cooling applications, the local heat transfer coefficient is always distributed over the surface.

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