Heat transfer characteristics of porous rocks

摘要: Equations are derived for predicting the effective thermal conductivity of beds unconsolidated particles containing stagnant fluid. The at these conditions, called conductivity, is a function conductivities solid and fluid phases, void fraction, and, if radiation important, emissivity, mean temperature, diameter particles. Comparison with available experimental data indicates that equations satisfactory fluids both high low conductivities. To extend theory to consolidated particles, it supposed formed by partial clogging cementing With this assumption theoretical packed extended include such materials as sandstone porous metals. resulting expressions involve consolidation parameter characteristic material. This quantity accounts heat transfer across contact surfaces between cemented or clogged correctly predict effect fraction on properties sandstones sintered metal systems.