Theory analyses and applications of magnetic fluids in sealing

Abstract Magnetic fluids are the suspensions composed of magnetic nanoparticles, surfactants, and non-magnetic carrier liquids. widely used in various fields, especially sealing, because their excellent features, including rapid response, flexible flow ability, tunable magneto-viscous effect, reliable self-repairing capability. Here, we provide an in-depth, comprehensive insight into theoretical analyses diverse applications sealing from three categories: static rotary reciprocating sealing. We summarize fluid mechanisms development seals 1960s to present, particularly focusing on recent progress seals. Although technology has been commercialized industrialized, many difficulties still exist its applications. At end review, present challenges future prospects also outlined.