• DOI:10.1021/la203931q
• Corpus ID: 13980779

Nonlinear deformation of a ferrofluid droplet in a uniform magnetic field.

@article{Zhu2011NonlinearDO,
  title={Nonlinear deformation of a ferrofluid droplet in a uniform magnetic field.},
  author={Guiping Zhu and Nam‐Trung Nguyen and Raju V. Ramanujan and Xiao-Yang Huang},
  journal={Langmuir : the ACS journal of surfaces and colloids},
  year={2011},
  volume={27 24},
  pages={
          14834-41
        }
}

• Guiping Zhu, N. Nguyen, +1 author Xiao-Yang Huang
• Published 15 November 2011
• Physics
• Langmuir : the ACS journal of surfaces and colloids

This paper reports experimental and numerical results of the deformation of a ferrofluid droplet on a superhydrophobic surface under the effect of a uniform magnetic field. A water-based ferrofluid droplet surrounded by immiscible mineral oil was stretched by a magnetic field parallel to the substrate surface. The results show that an increasing flux density increases the droplet width and decreases the droplet height. A numerical model was established to study the equilibrium shape of the ferrofluid droplet. The governing equations for physical fields, including the magnetic field, are solved by the finite volume method. The interface between the two immiscible liquids was tracked by the level-set method. Nonlinear magnetization was implemented in the model. Comparison between experimental and numerical results shows that the numerical model can predict well the nonlinear deformation of a ferrofluid droplet in a uniform magnetic field.