Abstract

The driving force of two types of nonmagnetic bodies which were immersed in magnetic fluid with rotating magnetic field was measured experimentally. The rotating magnetic field was applied by two-pole and four-pole three-phase electric magnets. The shapes of nonmagnetic bodies are plate-like and cylindrical. The four-pole magnet can provide the rotational flow of magnetic fluid. The driving force of the plate-shaped nonmagnetic body depended on the rotational flow of magnetic fluid. On the other hand, the driving force of the cylindrical nonmagnetic body was applied in the opposite direction of the rotational flow of magnetic fluid.

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