Recovery characteristics of thermal regime of the soil in one- and two-dimensional problems with the interface

Abstract

The objective is to consider the following problems: temperature distribution in the soil with heterogeneous structure of its layers; determination of thermophysical characteristics of the soil - heat capacity, thermal conductivity and thermal diffusivity of leached black earth soil in Altai area of the River Ob; the algorithm and the numerical method for solving a two-dimensional problem of the soil thermal regime with the interface between the two regions with different thermophysical parameters. Temperature and heat-flux continuity conditions are established at the interface between soil compartments. The numerical method with the use of the longitudinal and transverse finite-difference scheme, that is the alternating direction method, is applied to the numerical solution of the problem. Problems of determining thermophysical coefficients at different values of moisture and diurnal and seasonal ranges of thermophysical parameters, which depend on soil moisture and density, are discussed.