A METHOD FOR DETERMINING PORE VOLUME CHARACTERISTICS AND POROUS MATERIALS' MATRIX THERMAL CONDUCTIVITY

摘要

Prior to the measurements a first volume element is specified in a porous material sample in order to record the distribution of pore volume characteristics and matrix thermal conductivity along a surface of the porous material sample. A second volume element is set for the record of a thermal conductivity distribution along the surface of the sample with the dimensions equal or close to the dimensions of the first volume element for the record of the pore volume characteristics' and matrix thermal conductivity. The porous material sample is subsequently saturated with at least two fluids with known different thermal conductivities. After each saturation a sample thermal conductivity is measured in each volume element of the sample equal to the second volume element and pore volume characteristics and the porous material matrix thermal conductivity are determined for each volume element of the sample corresponding to the first volume element. The pore volume characteristics and the matrix thermal conductivity distribution along the surface of the sample are determined.