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Journal of Porous Media
Fator do impacto: 1.752 FI de cinco anos: 1.487 SJR: 0.43 SNIP: 0.762 CiteScore™: 2.3

ISSN Imprimir: 1091-028X
ISSN On-line: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v21.i4.10
pages 295-309

EFFECT OF THE METALLIC FOAM HEAT SINK SHAPE ON THE MIXED CONVECTION JET IMPINGEMENT COOLING OF A HORIZONTAL SURFACE

Nawaf H. Saeid
Flow Modeling and Simulation Research Cluster, Universiti Teknologi Brunei, Tungku Link, Gadong, BE 1410, Brunei Darussalam
Nurul Hasan
Flow Modeling and Simulation Research Cluster, Universiti Teknologi Brunei, Tungku Link, Gadong, BE 1410, Brunei Darussalam
Mohamed Hairol Bin Hj Mohd. Ali
Flow Modeling and Simulation Research Cluster, Universiti Teknologi Brunei, Tungku Link, Gadong, BE 1410, Brunei Darussalam

RESUMO

The effects of six different shapes of aluminum foam heat sinks attached to a horizontal heated surface are investigated numerically under the slot-jet impingement cooling. Various aluminum foam heat sink shapes are considered for easy manufacturing, such as rectangle, elliptic, trapezoidal, opposite trapezoidal, triangle, and opposite triangle. The jet inlet flow is in the vertical direction from the top, which leads to the opposing mixed convection mode condition. The air flow through the aluminum foam heat sinks is modeled using the porous media model. The results are presented for two different types of aluminum foams. The governing parameters are grouped into Reynolds number, Grashof number, and the metallic foam heat sink shape and properties (inertial resistance factor, permeability, and porosity). The results show that the cooling process enhancement can be achieved by attaching any one of the shapes and both types of the aluminum foam heat sinks considered. It is found that the most effective heat sink shape depends on the flow conditions (Re, Gr, and foam shape and properties). The results presented show the effects of the shape of the metal foam on the heat dissipation for different flow conditions. The results also show the superiority of the convex-shape heat sinks under the forced convection mode conditions. On the other hand, the results show that the concave-shape heat sinks are more effective than the convex ones under the mixed convection mode conditions.


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