Abstract
Magnetorheologic fluids (MRF) are suspensions consisting of a synthetic oil and very small soft-magnetic particles. In a magnetic field, the particles are locked to long chains. In consequence of it, the viscosity and the flow behaviour of the fluid are considerably changed. This reversible effect can be used in actuators, especially for controlled damping of shocks and vibrations, or in fluid devices for the electro-magnetical influencing of flows. The paper describes the flow behaviour of magnetorheologic fluids in narrow channels, influenced by variable magnetic fields and temperature. Furthermore, possibilities and limits of applying magnetorheologic fluids in smart actuators are discussed.
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