Experimental analysis on MR fluid channel flow dynamics with complex fluidwall interactions

Hideya Nishiyama, Hidemasa Takana, Keisuke Shinohara, Kotoe Mizuki, Kazunari Katagiri, Makoto Ohta

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


MR fluid plugging performance by aggregation of magnetized particles in MR fluid is recently expected to be one of the most promising applications in medical or safety devices, such as blood flow control, steam issuing shut-down valve and fuel supply control for automobile. In this study, dynamic response of MR fluid plugging and its breakdown in a pressure mode with complex fluidwall interactions was experimentally investigated, considering the effects of magnetic flux density, wall surface structure, wall permeability and wall elasticity of tube. Higher endurance pressure is obtained for wall surface groove structure and for steel wall due to a strong anchoring effect by rigid cluster formation in a concave region and strong MR fluid column formation in a channel core region, respectively. Furthermore, MR fluid plugging performance and the fluid storage characteristic of PVA tube as a bio-material was clarified. Because of the large radial expansion of the tube at the applied magnetic region in a pressure mode, PVA tube shows unique characteristics, such as storing MR fluid under magnetic field and MR fluid jet issuing under releasing magnetic field.

Original languageEnglish
Pages (from-to)1293-1297
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Issue number10
Publication statusPublished - 2011 May


  • Biomaterial
  • Complex channel flow
  • Flow control
  • Magnetorheological fluid
  • Viscoelasticity
  • Wall structure


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