Влияние скачкообразного изменения магнитного поля на течение бингамовской жидкости в плоском МГД-канале

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В.И. Вишняков, С.М. Вишнякова, П.В. Дружинин
22 ISSN 1812-3368. Вестник МГТУ им. Н.Э. Баумана. Сер. Естественные науки. 2017. № 3
dent consideration of flows in viscous and plastic zones in
a flat MHD channel enables studying the behavior of the
boundary between the zones when an external magnetic
field is abruptly changed. We obtained the exact equation
that determines the dependence of the zone width of plas-
tic flow on the time and on magnetic field. Moreover, we
performed a numerical integration of the equation for
some values of parameters to identify the nature of the
searched dependence and gave the results in graphs. Theo-
retical analysis and numerical calculations show that the
sudden magnetic field increase causes a sharp increase in
the zone width of plastic flow in a short time period, but
the transition to the new steady state is complete in infinite
time. The proposed method allows determining the posi-
tion of the boundary of the plastic flow zone as a function
of time in the case of an abrupt decrease in the external
magnetic field induction
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