Possibilities of the kinetic method for modelling the thermal field of fixed bodies in a rare plasma

Аuthors

Cherepanov V. V.

Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia

e-mail: vvcherepanov@yandex.ru

Abstract

The paper completes a small series of works devoted to methods for modeling the process of formation of a thermal field in the vicinity of motionless bodies in a rarefied plasma. The work uses the previously presented mathematical model of the relaxation process of the region of disturbance introduced into a collisionless ionized gas by a charged ball or cylinder. The curvilinear system of nonholonomic coordinates was selected to minimizing the phase space of the kinetic problem, that it helped one to increase the efficiency of the corresponding numerical methods. Key details of the implementation of the model and solution method are revealed. Using the example of solving the problem for a ball, the presence of significant nonequilibrium in the particle distribution function in the disturbed zone is shown. An analysis is given of the evolution of the behavior of gas characteristics in the disturbed zone, the thermal field in the vicinity of the body, and thermal loads on its surface. The mechanism of heating for charged attracting particles in the vicinity of spherical bodies has been established and described, and notable features of the formation of heat flow on spherical body in plasma have been analyzed.

Keywords:

heat and mass transfer, rarefied plasma, absorbing charged ball, disturbed zone, kinetic problem, self-consistent field, phase space, nonholonomic coordinates, distribution function, macroparameters, evolution and stationary state

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