Occurrence of periodic regimes in steady supersonic MHD flows due to loss of electrical conductivity of medium
A study is made of the features of supersonic magnetohydrodynamic flows due to the vanishing of the electrical conductivity of the gas as a result of its cooling. The study is based on the example of the exhausting from an expanding nozzle of gas into which a magnetic field perpendicular to the plane of the flow is initially frozen. It is demonstrated analytically on the basis of a qualitative model and by numerical experiment that besides the steady flow there is also a periodic regime in which a layer of heated gas of electric arc type periodically separates from the conducting region in the upper part of the nozzle.
layer of heated gas of electric arc type
scientific article; zbMATH DE number 3956730