Magnetohydrodynamics of Ferrofluid Flows

Magnetohydrodynamics of ferrofluid flows explores the interaction between magnetic fields and fluid motion in suspensions of ferromagnetic nanoparticles. These fluids combine the governing equations of fluid dynamics with Maxwell’s equations to capture body forces arising from magnetic field gradients. Key phenomena include field-induced instabilities, controlled vortex formation and enhanced heat transfer in rotating and sheared configurations. By tuning external magnetic fields, researchers can manipulate flow patterns, suppress turbulence or promote mixing at microscales. Applications span thermal management in electronics, microfluidic reactors, biomedical therapies and adaptive sealing technologies. Recent advances have deepened understanding of non-Newtonian effects, complex boundary conditions and multiscale coupling, laying the groundwork for engineered devices that exploit magnetically driven flow control.

Research from Nature Portfolio

Recent studies have elucidated the dynamics of ferrofluids over rotating surfaces under magnetic actuation. One investigation applied computational fluid dynamics to an iron(III) oxide–water nanofluid flowing axisymmetrically over a spinning disk. It demonstrated that increasing nanoparticle concentration and magnetic force parameters can hinder radial motion while enhancing tangential velocity, thereby modulating heat transfer performance for thermal engineering applications. A second work examined hybrid alumina–copper nanoparticle suspensions over a nonlinearly stretching disc subject to an alternating magnetic field. Exploiting similarity transformations and Lie group analysis, the authors showed that hybrid nanofluids achieve higher Nusselt numbers than single-component counterparts, with heat transfer rates strongly dependent on magnetic field intensity and stretching exponent. These findings offer design principles for optimising rotating-disk devices in heat exchangers and magnetic pumps.

Magnetohydrodynamics of Ferrofluid Flows publication trend

The graph below shows the total number of articles in magnetohydrodynamics of ferrofluid flows across all publications each year (not limited to Nature Index journals).

Technical terms

Magnetohydrodynamics: Study of electrically conductive fluid flow influenced by magnetic fields, coupling Navier-Stokes and Maxwell’s equations.

Ferrofluid: Colloidal suspension of ferromagnetic nanoparticles in a carrier liquid, responsive to external magnetic fields without solidification.

Kelvin force: Body-force density proportional to the product of magnetisation gradient and magnetic field, driving fluid motion in non-uniform fields.

Hartmann number: Dimensionless ratio of electromagnetic force to viscous force, indicating the influence of magnetic fields on flow.

Nusselt number: Dimensionless heat transfer coefficient comparing convective to conductive heat flux across a boundary layer.

Prandtl number: Dimensionless ratio of momentum diffusivity (viscosity) to thermal diffusivity, governing boundary layer thicknesses.

References

1. A computational fluid dynamics analysis on Fe3O4–H2O based nanofluid axisymmetric flow over a rotating disk with heat transfer enhancement. Scientific Reports (2023).
2. Heat transfer and hybrid ferrofluid flow over a nonlinearly stretchable rotating disk under the influence of an alternating magnetic field. Scientific Reports (2022).
3. A Current Loop Model for the Fast Simulation of Ferrofluids. IEEE Transactions on Visualization and Computer Graphics (2023).
4. Nanoparticle and scalar mixing of magnetic colloids in microchannels—Prevalence of Kelvin body force over spin-up flow. Chemical Engineering Science (2025).
5. Numerical evaluation of the ferrofluid behaviour under the influence of three-dimensional non-uniform magnetic field. International Journal of Heat and Fluid Flow (2022).