The proposed model predicts the thermal conductivity in porous media from endmember properties (e.g., air, solid matrix, and saturating fluid thermal conductivities), a scaling exponent, and a percolation threshold. The validation of the adopted numerical method is performed by comparing the effective thermal conductivity (etc) obtained from the simulation results with the experimental data. The individual thermal conductivities are calculated as geometric mean of the thermal conductivity of the porous material and of the respective fluid phase.
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This paper presents an analysis of the validity of the zbs correlation in this regard.
In this paper, reference values and reference correlations for the thermal conductivity and viscosity of pure fluids are reviewed.
K o = thermal conductivity of continuous phase (w/m k) k 1 = thermal conductivity of embedded phase (w/m k) ø = porosity (fraction) k eff = effective thermal conductivity (w/m k) source John wiley & sons, chapter