Numerical Analysis of the Influence of Structural Parameters on Heat Transfer Characteristics of Open Cell Foam
To understand the impact of the porosity and pore density in random Kelvin cell structures on the fluid pressure drop,volumetric convection heat transfer coefficients and area optimization factor in foam materials,computational fluid dynamics(CFD)method was used to numerically simulate the forced convection heat transfer(FCHT)process in aluminum foam materials with various porosities and pore densities featuring random Kelvin cell structures.The findings indicate that within an inlet velocity range of 5-20 m/s,both fluid pressure drop and volumetric convection heat transfer coefficients increase as po-rosity decreases and pore density increases when the inlet velocity remains constant;additionally,the ar-ea optimization factor increases with the increase in porosity and decreases with the decrease in pore den-sity.Within the inlet velocity range of 5-20 m/s,the trend of the area optimization factor varies with inlet velocity and pore density.As the inlet velocity increases,the area optimization factor for random Kelvin cell foam with a pore density of 5PPI increases,it first increases and then decreases for 10PPI,and it de-creases for 20PPI.Both pressure drop and volumetric convection heat transfer coefficients exhibit expo-nential and logarithmic increases,respectively,with rising inlet velocities.
open cell foamrandom Kelvin cell structurecomputational fluid dynamics(CFD)forced convection heat transfer(FCHT)volumetric convective heat transfer coefficient
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