Diffusion microrheology of ferrofluids

Authors

  • R. Peredo-Ortíz Departamento de Física, Centro de Investigación y Estudios Avanzados del Instituto Politécnico Nacional Apartado Postal 14-740, Ciudad de México, México.
  • M. Hernández-Contreras Departamento de Física, Centro de Investigación y Estudios Avanzados del Instituto Politécnico Nacional Apartado Postal 14-740, Ciudad de México, México.

DOI:

https://doi.org/10.31349/RevMexFis.64.82

Keywords:

Viscoelasticity, ferrofluids, microrheology, rheology, colloids.

Abstract

We provide a statistical mechanics approach to study the linear microrheology of thermally equilibrated and homogeneous ferrofluids. The

expressions for the elastic and loss moduli depend on the bulk microstructure of the magnetic fluid determined by the structure factor of the

suspension of magnetic particles. The comparison of the predicted microrheology with computer simulations confirms that as a function of

relaxation frequency of thermal fluctuations of the particle concentration both theory and simulations have the same trends. At very short

frequencies the viscous modulus relates to the translational and rotational self-diffusion coefficients of a ferro-particle.

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Published

2018-02-08

How to Cite

[1]
R. Peredo-Ortíz and M. Hernández-Contreras, “Diffusion microrheology of ferrofluids”, Rev. Mex. Fís., vol. 64, no. 1 Jan-Feb, pp. 82–93, Feb. 2018.

Issue

Vol. 64 No. 1 Jan-Feb (2018): Revista Mexicana de Física

Section

05 Condensed Matter

License

Authors retain copyright and grant the Revista Mexicana de Física right of first publication with the work simultaneously licensed under a CC BY-NC-ND 4.0 that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.