A temperature behavior of frozen soils: Field experiments and numerical solution

摘要: Abstract On the basis of field (natural) measurements, which were carried out by authors in cold regions such as Siberia The Russian Federation, temperature distributions and phase front propagation are analyzed during thawing process frozen soils (permafrost). treatment experimental data was on likeness dimensionality theory. In this way distribution a function dimensionless values (criteria), characterizing geometry calculation domain, thermo-physical properties also level transitions — criterion Stefan to be obtained general form. measurements form shows that natural for wide range both soil surface variation depth group near certain universal curves loamy sandy soils, respectively. These may approximated self-similar with parameter depends thermal physical massif. By method linear regression dependence penetration coordinate time is discussed detail. It shown different from solution. described generalized approximation study good agreement data. nonlinear system equations (general Boundary Value Problem) corresponding considered problem, numerical solution presented. For between observed.