Double-gap bicone magnetorheology in steady shear under homogeneous magnetic and flow fields

Double-gap bicone magnetorheology in steady shear under homogeneous magnetic and flow fields

Blog Article

We design, fabricate, and test a double-gap bicone magnetorheological (MR) device to measure steady shear rheological properties of MR fluids under saturating magnetic fields (i.e., large enough to saturate the MR L-Glutathione fluids).The device is optimized using finite element method and computational fluid dynamics simulations so that homogeneous, saturating field strengths are reached while keeping a constant shear rate within T-Shirts the main shearing gaps.Experiments demonstrate that the flow curves in the saturation regime can be fitted to a viscoplastic Casson model in good agreement with MR fluids under much lower (nonsaturating) fields.

Moreover, yield stress data follow a linear dependence on volume fraction at low particle loadings, in agreement with existing theoretical models.