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Related Experiment Video

Updated: May 31, 2026

Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation

Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation

Published on: August 28, 2017

Modeling bubbles and droplets in magnetic fluids.

Mark S Korlie¹, Arup Mukherjee, Bogdan G Nita

¹Department of Mathematical Sciences, Montclair State University, 1 Normal Avenue, Montclair, NJ 07043, USA.

Journal of Physics. Condensed Matter : an Institute of Physics Journal

|June 23, 2011

Summary

This summary is machine-generated.

We developed a volume of fluid code to simulate magnetic fluid dynamics. Bubbles and droplets of magnetic fluids change shape in fields, with bubbles breaking up more readily than droplets.

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Area of Science:

Fluid dynamics
Magnetohydrodynamics
Computational physics

Background:

Understanding the behavior of magnetic fluids is crucial in various applications, including microfluidics and advanced materials.
Simulating dynamic interfaces in multiphase magnetic fluid systems presents significant computational challenges.

Purpose of the Study:

To develop and validate a computational code for simulating two-fluid systems involving magnetic fluids.
To investigate the shape dynamics and breakup of bubbles and droplets in ferrofluids under external magnetic fields.

Main Methods:

Implementation of a volume of fluid (VOF) type code for direct numerical simulation.
Modeling equilibrium magnetization and linear magnetic materials with uniform imposed magnetic fields.
Simulation of non-magnetic bubbles rising in ferrofluid and ferrofluid droplets falling in non-magnetic fluid.

Main Results:

Both bubbles and droplets exhibit shape changes (elongation) along vertical magnetic field lines.
Bubbles become more prolate than droplets, leading to more frequent breakup in stronger fields.
Observed indirect effects include altered rise times and flow modifications due to increased Reynolds numbers.

Conclusions:

The developed VOF code effectively simulates complex magnetic fluid interface dynamics.
The study quantifies the distinct shape evolution and breakup behaviors of bubbles and droplets in magnetic fields.
Findings provide insights into the fundamental physics governing multiphase ferrofluid systems.