Theoretical Development in the Viscosity of Ferrofluid

Abstract The viscosity of ferrofluid has a vital role in liquid sealing the hard disk drives, biomedical applications as drug delivery, hyperthermia, and magnetic resonance imaging. theoretical expressions for its limitation are presented detail this article. A qualitative comparison experimental results is also shown. In absence field, depends on volume concentration nanoparticles, including surfactant layers. However, due to stationary field angle between applied vorticity flow. If 90 deg, then there maximum increase viscosity. When frequency matches with relaxation time, known condition, no impact an alternating ferrofluid. less than frequency, increases For diluted ferrofluid, present have good agreement data.