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- W22174429 abstract "In studying the flow of an ionized gas in a magnetic field, a full set of equations of magnetohydrodynamics must be solved, and this task is a difficult problem even with the use of numerical methods. Sometimes with sufficiently general assumptions about the flow conditions it is possible to find an analytical solution of that part of the system describing the distribution of electrical quantities in the flow. These solutions are important since they can be used directiy to determine dynamic gas parameters without solving the whole set of equations. In order to investigate phenomena in zones of a sharp break in magnetic field, the analytical solution is sought on the assumption of two- dimensional processes with the use of a Riemann boundary problem for automorphous iunctions. A general solution is obtained, where the profile of current velocities is arbitrary, while the magnetic field and the accompanying physical characteristics of the plasma undergo an abrupt change. Estimates are given for the effect of eddy currents formed in zones of an abrupt change of magnetic field on the distribution of electric potentials and on power processes in MRD-channels. New interesting effects include: 1) an inhomogeneous spreading out of the flow inmore » the initial zone of a channel leads to deflection of the plasma flow to the cathode and reflection from the cathode to the anode wall; this process along the channel length is repetitive in character, 2) at the exit zone of a channel during supersonic flow of a plasma there is formed a zone of subsonic flow. From these results it is possible to visualize the main electrodynamic processes in a plasma at its entrance into a magnetic field. (SJR)« less" @default.
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- W22174429 date "1973-01-01" @default.
- W22174429 modified "2023-09-26" @default.
- W22174429 title "Problem of formation of eddy currents in a moving plasma during a sharp change of magnetic field" @default.
- W22174429 hasPublicationYear "1973" @default.
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