Related Experiment Video
Updated: May 13, 2026

Magnetic Levitation Coupled with Portable Imaging and Analysis for Disease Diagnostics
Published on: February 19, 2017
Magnetic-induced migration in a sedimenting suspension of magnetic spherical particles
1Fluid Mechanics of Complex Flows Lab-VORTEX, Department of Mechanical Engineering, University of Brasilia, Brasilia-DF 70910 900, Brazil.
Abstract:
We study the relative trajectories of two magnetic spheres interacting in a dilute suspension in the presence of particle inertia and Brownian motion effect. The particles settle relative to one another under the action of gravity and when in close contact they exert on each other a magnetic force and torque due to a permanent magnetization. The balance equations of forces and torques for the two particles are considered in the present formulation. The numerical simulations are based on direct computations of the hydrodynamic and the magnetic interactions among the rigid spheres in the regime of no-null Stokes number. The behavior of these suspensions is examined based on the relative trajectories calculated for several initial configurations. The calculations show that fluctuations in particle orientation produced by the continuous magnetic interactions and by the Brownian motion exerts a significant effect on the understanding of particle aggregation and particle migration in magnetic suspensions.
More Related Videos
Related Concept Videos
Other Unique Bacteria
Motion Of A Charged Particle In A Magnetic Field
Magnetic Fields
A magnetic field is defined by the force that a charged particle experiences...
Magnetic Susceptibility and Permeability
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
Diamagnetism
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets.
Magnetic Damping
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...

