Mathematical model of thermocurrents based on calculation of electrical resistance and thermopower as an integral over electron energy

In this paper current distribution model in the tungsten sample and vapor at surface under electron beam heat was considered. The model is based on the solutions of electrodynamic equations and the two-phase Stefan problem in cylindrical coordinates. Based on the temperature distribution in the computational domain, the electrical resistance and thermopower were calculated through the integral over the electron energy at each grid node. Current is considered as a possible source of rotation of matter, which is observed in experiment. The results of the simulation showed the role of thermal emission and the development path of the model. The model parameters are taken from the experiments on the Beam of Electrons for materials Test Applications (BETA) stand, created at the BINP SB RAS.