Recovery of heat conductivity coefficients and volumetric heat capacity as temperature functions by experimental data obtained at a plant for testing loose ground layers

Abstract
The existing analytical method to treat experiments  for defining thermal physical characteristics of moisture containing materials as functions of temperature on the basis of a dynamic method of free cooling results in incorrect heat conductivity coefficients in the range of  phase transfer temperatures. A numerical method to estimate reliability of coefficients computed by a proposed method is presented. To define the values of recovered thermal physical characteristics more precisely a method to treat experimental data is proposed; it is based on  a numerical solution of the coefficient inverse problem of heat conductivity where data logged in the experiment proper are used as boundary condition, namely temperature inside the specimen and heat flow on its surface.