In medicine, superparamagnetic nanoparticles bound to chemotherapeutics are currently investigated for their feasibility in local tumor therapy. After intraarterial application, these particles can be accumulated in the targeted area by an external magnetic field to increase the drug concentration in the region of interest (Magnetic-Drug-Targeting). We here present an analytical method (HPLC-UV...

We develop, test and apply a volume of fluid (VOF) type code for the direct numerical simulation of two-fluid configurations of magnetic fluids with dynamic interfaces. Equilibrium magnetization and linear magnetic material are assumed and uniform imposed magnetic fields are considered, although extensions to nonlinear materials and to fields with spatio-temporal variability are possible. Model...

An electrospray ion source was operated using a newly designed ionic liquid ferrofluid based on the ionic liquid EMIM-NTf2. The magnetic properties of the fluid were exploited to create self-assembling array of peaks on the fluid surface, which were then amplified using an electric field, eventually causing ions to be emitted from the tip of each peak in the instability. A beam current of 72 mi...

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 ...

Viscous fingering occurs in the flow of two immiscible, viscous fluids between the plates of a Hele-Shaw cell. Due to pressure gradients or gravity, the initially planar interface separating the two fluids undergoes a Saffman-Taylor instability and develops finger-like structures. When one of the fluids is a ferrofluid and a perpendicular magnetic field is applied, the labyrinthine instability ...

Abstract. The motion and shape of a ferrofluid droplet placed in a non-magnetic viscous fluid and driven by a magnetic field are modeled numerically. The governing equations are the Maxwell equations, momentum equation and incompressibility. The numerical simulation uses a volume-of-fluid algorithm with a continuum-surface-force formulation for an axisymmetric geometry. The deformations in the ...

Laminar and turbulent pipe flow of a ferrofluid with an imposed linearly polarized, oscillating, magnetic field is examined here. Experimental results show a fractional pressure drop dependence on flow rate, magnetic field strength, and oscillation frequency. Calculations are presented, which show that ferrofluid theory can explain the flow phenomena in laminar and turbulent pipe flow. The mode...

We report magnetic manipulation of non-magnetic particles suspended in diluted ferrofluid. Diamagnetic particles were introduced into a circular chamber to study the extent of their deflection under the effect of a non-uniform magnetic field of a permanent magnet. Since ferrofluid is a paramagnetic medium, it also experiences a bulk magnetic force that in turn induces a secondary flow opposing ...

We studied the polarized light patterns obtained using a thin film of ferrofluid subjected to an applied magnetic field. with field configurations between parallel plates, monopolar, tetrapolar, and hexapolar, how varies for different intensities orientations Using Jones calculus, we explored key optical properties this system these relate have observed general aspects by transmission in Ferroc...