Problem of gas motion in tubes of variable cross section and its application to solar wind perturbations

Abstract

A qualitative study of self-similar flows with consideration of possible initial gas motion is performed for the problem of motion of a variable density gas in shock tubes with varying cross section. Asymptotic formulas are obtained near the contact discontinuity, and a numerical solution is obtained for the case of finite density on the contact surface. The equations are applied to the problem of gas motion in solar flares, and the parameters of the disturbed magnetic field are calculated. The results of the computation are compared with data from shock-wave observation in outer space.