Controlling lateral nanomixing and velocity profile of dilute ferrofluid capillary flows in uniform stationary, oscillating and rotating magnetic fields

Magnetic Fluids’ Heating Power Exposed to a High‐Frequency Rotating Magnetic Field

“…Another approach to creating RMF is with a stator of a three-phase induction motor, where locally distributed coils are powered with the appropriate time-shifted voltages, as is done in [17]. is approach is not applicable for this application because of two problems.…”

“…e basis for the construction of an RMF was taken from [13] and [15][16][17] and modified in such a way that magnetic fields could be generated suitable for medical hyperthermia.…”

Magnetically induced agitation in liquid‐liquid‐magnetic nanoparticle emulsions: Potential for process intensification

“…In the case of OMFs (Figures b and b), no significant difference is observed when comparing tests in the absence of magnetic field to the ones where it is applied. Indeed, as explained by Hajiani and Larachi, MNP relaxation time is sufficiently short to allow random reorientation of the magnetic dipoles in the midst of OMFs oscillating cycles, resulting in zero spatially averaged torques when the field is reoriented and the MNPs are magnetized once again. In sum, OMFs do not bring the particles/droplets in a synchronous spin in colloidal suspension or in ferrofluid emulsion and hence they are not able to exert a measurable torque on the rotating spindle of the viscometer.…”

“…Recently, this energy transfer from the MNPs to the liquid has been put in use by converting the suspended particles into nanostirrers allowing control of mixing in nanoscale when the whole system is subject to rotating, oscillating, and static uniform magnetic fields (RMF, OMF, SMF) . In doing so, it has been shown that rotating MNPs under transverse RMF generates nanoscopic liquid eddies inducing enhancement of liquid transport properties beyond the conventional paradigm of molecular diffusion …”

Inception of vortical coherent structures from spinning magnetic nanoparticles in rotating magnetic fields – New nanofluid microscale mixing tool

“…Owing to this disposition, they have been involved in many applications where mixing at the micro-scale is a critical issue, e.g., catalytic reactions, separation, drug delivery and microfluidic devices [6][7][8][9]. In parallel, MNPs have also been studied for use as nanoscale devices to stimulate mixing in micro-scale when the whole system is subject to timevarying external magnetic fields [10][11][12][13][14]. The potential for mixing applications appears particularly remarkable for rotating magnetic fields (RMFs) although different magnetic fields have been considered [9][10][11][12][13][14].…”