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CFD SIMULATION OF FORCED CONVECTIVE HEAT TRANSFER BY TETRAKAIDECAHEDRON MODEL IN METAL FOAMS

Volumen 19, Ausgabe 1, 2016, pp. 1-11
DOI: 10.1615/JPorMedia.v19.i1.10
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ABSTRAKT

Modeling of convective heat transfer within the range of Reynolds number 20−4500 in idealized open cell metal foam with three different pore diameters (2,4, and 6 mm) was performed in this research. Also, the tetrakaidecahedron ideal cell and three-dimensional Reynolds-averaged Navier-Stokes equations (RANS) were employed for the numerical solution of the fluid flow and energy equations in porous media. Visualizing the results showed that an increase in the Reynolds number when passing through the transition zone (according to the friction factor versus Reynolds number diagram, the transition zone determined a range of 60 < ReK < 1000) significantly increases the recirculation region behind the struts. Therefore, by passing through the transition zone and entering the turbulence zone, the convective heat transfer coefficient increased significantly and it would be intensified by the reduction in the pore diameter. Also, the comparison of the results with the available experimental data in the literature confirmed that the above modeling could enjoy good precision in application.

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