Migration of ferrofluid droplets in shear flow under a uniform magnetic field

Soft Matter ◽  
2019 ◽  
Vol 15 (11) ◽  
pp. 2439-2446 ◽  
Author(s):  
Jie Zhang ◽  
Md. Rifat Hassan ◽  
Bhargav Rallabandi ◽  
Cheng Wang
Keyword(s):  
Magnetic Field ◽  
Shear Flow ◽  
Uniform Magnetic Field ◽  
Novel Approach

We demonstrated a simple and novel approach to manipulate droplet migration in microfluidics by using a uniform magnetic field.

scholarly journals Dynamics of magnetic chains in a shear flow under the influence of a uniform magnetic field

2012 ◽  
Vol 24 (4) ◽  
pp. 042001 ◽  
Author(s):  
Tae Gon Kang ◽  
Martien A. Hulsen ◽  
Jaap M. J. den Toonder
Keyword(s):  
Magnetic Field ◽  
Shear Flow ◽  
Uniform Magnetic Field ◽  
Magnetic Chains

scholarly journals Dynamics of a Pair of Paramagnetic Janus Particles under a Uniform Magnetic Field and Simple Shear Flow

2021 ◽  
Vol 7 (1) ◽  
pp. 16
Author(s):  
Christopher Sobecki ◽  
Jie Zhang ◽  
Cheng Wang
Keyword(s):  
Magnetic Field ◽  
Magnetic Material ◽  
Shear Flow ◽  
Simple Shear ◽  
Uniform Magnetic Field ◽  
Particle Orientation ◽  
Viscous Force ◽  
Simple Shear Flow ◽  
A Chain ◽  
The Right

We numerically investigate the dynamics of a pair of circular Janus microparticles immersed in a Newtonian fluid under a simple shear flow and a uniform magnetic field by direct numerical simulation. Using the COMSOL software, we applied the finite element method, based on an arbitrary Lagrangian-Eulerian approach, and analyzed the dynamics of two anisotropic particles (i.e., one-half is paramagnetic, and the other is non-magnetic) due to the center-to-center distance, magnetic field strength, initial particle orientation, and configuration. This article considers two configurations: the LR-configuration (magnetic material is on the left side of the first particle and on the right side of the second particle) and the RL-configuration (magnetic material is on the right side of the first particle and on the left side of the second particle). For both configurations, a critical orientation determines if the particles either attract (below the critical) or repel (above the critical) under a uniform magnetic field. How well the particles form a chain depends on the comparison between the viscous and magnetic forces. For long particle distances, the viscous force separates the particles, and the magnetic force causes them to repel as the particle orientation increases above the configuration’s critical value. As the initial distance decreases, a chain formation is possible at a steady orientation, but is more feasible for the RL-configuration than the LR-configuration under the same circumstances.

Surface of a magnetic fluid containing magnetizable bodies in an applied uniform magnetic field

2008 ◽  
Vol 44 (2) ◽  
pp. 175-182 ◽  
Author(s):  
K. Zimmermann ◽  
V.A. Naletova ◽  
I. Zeidis ◽  
V.A. Turkov ◽  
D.A. Pelevina ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fluid ◽  
Uniform Magnetic Field
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