Viscosity characteristics of water based magnetic fluids mixing a water soluble polymer

Viscosity of water based magnetic fluid and polymer mixed magnetic fluids is measured by using a cone-and-plate viscometer with applying magnetic field from the bottom of the plate. As the result, effect of structural viscosity (shear thinning) of polymer solution is observed despite of magnetic field. Furthermore it was also observed that viscosity of polymer mixed magnetic fluid is slightly decreased by applying magnetic field for wide range of shear rate.