Abstract
The objective of this study is to provide the fundamental data for the novel application of MR fluid plugging(MRF plugging) to a medical or safety devices for flow control. Experimental evaluation on dynamic response of MRF plugging in pressure mode was conducted to clarify the effect of piston velocity, magnetic flux intensity and wall surface roughness to its plugging performance. MRF plugging performance has been discussed through the evaluation of the endurance pressure of MRF plugging and flow rate. It is shown that the endurance pressure of MRF plugging is increased by the piston velocity, the magnetic flux intensity, and the adoption of wall surface structure. Furthermore, the endurance pressure is decreased for the circular and elastic tube, assuming a biological tube.
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