Journal
MICROFLUIDICS AND NANOFLUIDICS
Volume 18, Issue 1, Pages 19-27Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s10404-014-1414-y
Keywords
Droplet-based microfluidics; Ferrofluid droplet; Breakup; Multiphase flow; Interfacial phenomenon
Funding
- National Natural Science Foundation of China [21106093, 21276175]
- Program of Introducing Talents of Discipline to Universities [B06006]
- China Scholarship Council
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This work aims at investigating the breakup dynamics of the ferrofluid droplet under magnetic fields in a microfluidic T-junction. The whole breakup processes of the ferrofluid droplets under uniform magnetic field and non-uniform magnetic field were exhaustively considered. The influence of both the flow rates and magnetic flux density on the formation and breakup were extensively studied. It was found that the type of breakup process can be changed and the breakup frequency of ferrofluid droplets can be actively modulated by applying a uniform magnetic field. While under non-uniform magnetic field, the asymmetric breakup of ferrofluid droplets can be realized. Both the magnetic field intensity and hydrodynamic force affect the asymmetry of the breakup process. The non-uniform magnetic field can exert attraction on ferrofluid droplets in a dissymmetrical way to avoid breakup.
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