Ferrofluids are magnetic liquids comprised of magnetic nanoparticles coated with surfactants and suspended in a carrier fluid. With biomedical and pharmaceutical applications in mind, we study the motion and deformation of axisymmetric ferrofluid droplets in the presence of non-uniform magnetic fields. Here we carry out direct numerical simulations of interfacial dynamics of ferrofluid droplet ...

The purpose of the present study is to investigate the boundary layer separation point in a magnetohydrodynamics diffuser. As an innovation, the Re value on the separation point is determined for the non-Newtonian fluid flow under the influence of the non-uniform magnetic field due to an electrical solenoid, in an empirical case. The governing equations include continuity and momentum are solve...

In this work, e-Fe3N nanoparticles and e-Fe3Nbased magnetic fluid were synthesized by chemical reaction of iron carbonyl and ammonia gas. The size of e-Fe3N nanoparticles was tested by TEM and XRD. Stable e-Fe3Nbased magnetic fluid was prepared by controlling the proper ratio of carrier liquid and surfactant. The saturation magnetization of stable e-Fe3N-based magnetic fluid was calculated acco...

The penetrating finger instability which develops when a less viscous fluid pushes a more yiscous fluid can be stabilized through the use of a magnetizable fluid in the presence of a magnetic field tangential to the interface. A uniform magnetic field only stabilizes suitably short waves traveling along the field lines. Transverse waves of all wavelengths and orientations are also stabilized if...

This study presents a flexible magnetically-actuated micro fluid transport system utilizing an isotropic magnetorheological elastomer (MRE). Theoretical modeling and analysis of this system is presented for a two-dimensional model. This fluid transport system can propel the fluid by applying a fluctuating magnetic field on the MRE. The magneto-fluid-structure interaction analysis is employed to...

In this paper, the effect of heat and mass transfer of an electrically conducting incompressible fluid which moves in presence of magnetic field between two parallel plates and under constant pressure gradient has been studied .after forming the governing equation of motion and choosing the suitable boundary conditions, the solution has been derived for the velocity of fluid and it has been stu...

The goal of this study is to understand the mechanics of a flexible magnetically-controllable fluid transport system. A two-dimensional time-dependent model using a coupled fluid-solid and magnetic model is developed. The flow of fluids through sinusoidal wall is modeled, numerically analyzed and compared with an analytical solution, for the passive case (i.e., zero applied magnetic field). The...

This article is concerned with the analytic solution for a nonlinear flow problem of an incompressible viscous fluid. The fluid is taken in a channel having two weakly permeable moving porous walls. An incompressible fluid fills the porous space inside the channel. The fluid is magnetohydrodynamic in the presence of a time-dependent magnetic field. Lie group method is applied in the derivation ...