Computer Modeling and Optimization of Soil Thawing Using Microwave Energy

Abstract

A mathematical model is developed to calculate the electromagnetic field A mathematical model is formu-lated, and a finite-difference method and computer programs are developed that allow effective computer mod-eling and optimization of high-speed soil thawing processes in various ways, including using magnetrons. As the main modeling method, a variant of the end-to-end "enthalpy" method without smoothing the concentrated heat capacity is used. A series of calculations was performed for the informative case of Sandstone and sandy loam during thawing by magnetrons of standard structures. The significant influence of nonlinearities of ther-mal parameters, phase transitions of melting and evaporation, and the type of boundary conditions on the val-ues of temperature and electric fields is established. The effect of losses on convective cooling and evaporation is negligible. The results of the work can be applied in the practice of research and design of earthmoving op-erations in the cryolithozone.