“…Topin et al [27] perform an experimental study considering several metal foams with differing characteristics (as rendered, e.g., through the number of pores-per-inch (PPI) and their porosity) to investigate the way permeability associated with a Darcy flow regime varies across the samples considered and to analyze the effect of fiber surface roughness on main flow patterns. In several studies focusing on metal foam samples, the effects of PPI and porosity on flow and heat transfer are investigated numerically upon considering Lattice-Boltzmann [28] and DNS ( [29]) approaches. Bhattacharya et al [30] provide a numerical study focused on the parameters exerting the highest effects on the pressure drop across aluminum metal foams with diverse PPIs (ranging from 5 to 40)…”