Simultaneous determination of intrinsic solid phase conductivity and effective thermal conductivity of Kelvin like foams

摘要: Abstract The relationship of geometrical parameters with thermal properties such as effective conductivity is critical for conductive heat transfer in metal foams. We have realized different virtual isotropic structures tetrakaidecahedron shape having circular, square, hexagon, diamond and star strut shapes various orientations using CAD modeling. range solid to fluid phase ratios ( λ s / f ) studied from 10 30,000 porosity 60–95%. At pore scale, 3-D direct numerical simulations were performed calculate conductivity, eff local equilibrium condition. A database 2000 values generated. Two models are derived order predict simultaneously intrinsic . modified correlation factor, F introduced analytical resistor model take conductivities constituent phases into account a new PF based on Lemlich derived. An excellent agreement has been observed between the predicted results against experimental data. also shown importance determining ).