Experimental and numerical investigation of flat plate fins and inline strip fins heat sinks

William Denner Pires-Fonseca; Carlos Alberto Carrasco-Altemani

doi:10.17533/udea.redin.20230417

Authors

William Denner Pires-Fonseca Universidade Estadual de Campiana https://orcid.org/0000-0001-5184-2193
Carlos Alberto Carrasco-Altemani Universidade Estadual de Campianas

DOI:

https://doi.org/10.17533/udea.redin.20230417

Keywords:

experimental investigation, heat sinks, cooling of electronic equipment

Abstract

The flow and heat transfer characteristics of two analogous heat sinks were obtained from laboratory experiments and compared to each other and to numerical simulations. One contained continuous straight fins, and the other inline strip fins, both cooled by forced airflow parallel to their base. The average airflow velocity in the interfin channels ranged from 4 to 20 m/s, corresponding to Reynolds numbers from 810 to 3,800. The measurements indicated that despite its smaller heat exchange area, the strip fins heat sink convective coefficient was larger enough to obtain a thermal resistance smaller than that of the continuous fins. Numerical simulations were performed to compare their results with the experiments. Two distinct fin treatments were used: one considered fins with no thickness, isothermal with the fins base temperature. The other considered the fins thickness and perfect thermal contact with the heat sink base. The Nusselt number simulation results for the continuous fins agreed within 3% with the measurements, but larger deviations were observed for the strip fins heat sink.

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Author Biographies

William Denner Pires-Fonseca, Universidade Estadual de Campiana

Researcher, Energy Departament

Carlos Alberto Carrasco-Altemani, Universidade Estadual de Campianas

Profesor, Departamento de Ingeniería Mecánica y Energía

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