Study of heat transfer in models of FCC, BCC, SC and DEM porous structures with different porosities

Abstract

Abstract In the present work, we investigated the effect of the geometry of the open cell foam material on the value of the pressure drop and heat flux. We create models of porous media with an ordered (FCC, BCC, SC) and disordered (DEM) structure with different values of material porosity: 0.7; 0.75; 0.8. Numerical modeling was carried out in the ANSYS Fluent software (v. 19.0) for various air flow velocities. At material porosities of 0.7 and 0.75 there is a noticeable increase in pressure drop in BCC and FCC packings, respectively. This is due to the features of creating the geometry of these packings. At material porosity of 0.8, the largest pressure drop corresponds to the packing of FCC cells. The structures show approximately the same heat flux value at air flow velocities of 0.01 and 0.05 m/s. At material porosity of 0.7 at velocities of 0.25-1.25 m/s, the largest values show the BCC packing. At material porosities 0.75 and 0.8, the values above correspond to the packing of FCC cells. The lowest heat flux values in SC cell packaging are observed at all investigated porosities. Also, the SC packing has the lowest pressure drop values and, therefore, the highest energy efficiency values.