# Thermal Conductivity of Porous Material

by jeallison
Tags: conductivity, heat, porous, thermo
 P: 1 does anyone know where this equation regarding the thermal conductivity of porous material K=K$_{}0$[(1-P)$/(1-B P$)] comes from? I know B has to do with thermal density, but I have no idea what P is? let alone the origins of the equation. This has to do with beds of spherical material. background: I'm doing a lit review for a graduate student and I'm stuck on this particular equation, and she doesn't know much about it either. thanks!