Flow of liquid metals with a transversely applied magnetic field. VII - Experiment on the unsteady channel flow

Physics

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Channel Flow, Magnetohydrodynamic Flow, Mercury (Metal), Oscillating Flow, Transient Pressures, Electric Fields, Hydrodynamics, Liquid Metals, Magnetic Fields, Pressure Gradients, Reynolds Number, Steady Flow, Transition Flow

Scientific paper

It is considered that transfer, control and measurement of molten metals by MHD devices are very important for automation in casting and metallurgical industries. This report deals with the experimental investigation on the transient flow of mercury in a rectangular channel. A constant magnetic field or constant magnetic and electric fields are suddenly applied in the direction perpendicular to the flow, and the created electromagnetic effects modify the motion to give rise to a magnetohydrodynamically developed flow. Then the applied fields are suddenly removed from the magnetohydrodynamically developed flow. It is shown that the flow undergoes oscillations during the transition from hydrodynamic to magnetohydrodynamic conditions or from magnetohydrodynamic to hydrodynamic ones and that the time required for the transient flow to reach the steady state is longer in the region of transitional flow.

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