Two-jet structure of the flow produced by magnetized hypersonic spherical source into the steady unmagnetized medium

[摘要] In the present paper we consider the steady flow produced by the hypersonic magnetized spherical source into the steady unmagnetized medium. The magnetic field of the source is considered purely azimuthal. The basic dimensionless parameter of the problem is Alfvén number at the inflow boundary at the source equatorial plane, which we denote as . We first review the numerical results, that was already presented in our recent paper (Golikov et al, 2017). According to our numerical results there should be a tangential discontinuity dividing the flow and the ambient medium. In the present paper we analytically derive the asymptotic behaviour of the tangential discontinuity radius as epsilon approaches zero.

[发布机构] Space Research Institute, RAS Profsoyuznaya Street 84/32, Moscow; 117335, Russia^1;Lomonosov Moscow State University, GSP-1, Leninskiye Gory, Moscow; 119991, Russia^2;A. Ishlinsky Institute for Problems in Mechanics, RAS Vernadsky Street 101(1), Moscow; 119526, Russia^3

[效力级别] 力学 [学科分类] 力学，机械学

[关键词] Ambient medium;Asymptotic behaviour;Dimensionless parameters;Equatorial planes;Jet structure;Numerical results;Tangential discontinuities