Synthesis and Analysis of MR Fluids for High Yield Stress
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2016, Vol 4, Issue 5
Abstract
Magneto Rheological fluids consist of micron sized magnetizable particles dispersed in a carrier liquid. In the offstate, these MR fluids behave similar to Newtonian fluids, having an apparent viscosity in the range of 0.1 to 1 Pa-s. Under the application of external magnetic field the apparent viscosity of MR fluid changes significantly resulting in high yield stress. In the present research work, synthesis and on state rheological characterization of in house fabricated MR fluids is analyzed. The MR fluids samples are prepared using iron particles of 300- 500 mesh dispersed in a carried fluid like silicone oil or mineral oil along with suitable additive to inhibit sedimentation of the particles. The on state yield stress of the MR fluids is calculated with respect to applied magnetic field intensity using relative permeability approach. These values of yield stress are further analytically validated using Carlson approach. It has been concluded that yield stress of MR fluids increases from 26.9 to 50.1 kPa with the change in volume fraction of iron particles from 22 to 32%.Further, the yield stress becomes 1.05 times with a change in carrier fluid from silicon oil to mineral oil.
Authors and Affiliations
S. K. Mangal, Kapil Munjal, Vivek Sharma
Keywords
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