Multi parameter optimization of the effect of porous fins on natural convection heat transfer in an enclosed cavity

DOI:	10.11809/bqzbgcxb2023.11.027
Keywords:	enclosed cavity; natural convection; porous fin; multi parameter optimization; response surface method; numerical simulation
Abstract:	In order to study effects of porous fin parameters on natural convection heat transfer in an enclosed cavity, the influence of the porous length l, installation position s, installation angle θ, Darcy number Da and effective thermal conductivity Ke on the natural convection heat transfer in the cavity are analyzed numerically by arranging porous fins on the hot wall in an enclosed cavity. The results are as follows:when Ra=105, the single parameter combination of porous fins with the maximum average Nusselt number of the hot wall is: l=0.35H, s=0.375H, θ=90°, increases by 33.3% compared with no fin structure. When Ra=105, the combination of porous fin parameters with the optimal convection heat transfer effect in the cavity obtained by applying the response surface method to analyze the influence of multiple parameters is: l=0.44H, s=0.34H, θ=101.72°. The average Nusselt number of hot wallincreases by 34.4% compared with no fin structure. When Ra=105, the average Nusselt number of the hot wall under the same Darcy number increases with the increase of effective thermal conductivity of porous fins. When the effective thermal conductivity remains constant, the increase of Darcy number is about to enhance convection heat transfer in the cavity. The effective thermal conductivity and Darcy numberof the porous fins have synergistic influence on improving convection heat transfer. The results of this paper can provide theoretical guidance for improving the natural convection cooling effect of electronic components in industrial production.
Issue:	Vol. 44 No. 11 (2023)
Published:	2023-11-28
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