Ferrohydrodynamics: Testing a third magnetization equation

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Abstract

A new magnetization equation recently derived from irreversible thermodynamics is employed to the calculation of an increase of ferrofluid viscosity in a magnetic field. Results of the calculations are compared with those obtained on the basis of two well-known magnetization equations. One of the two was obtained phenomenologically, another one was derived microscopically from the Fokker-Planck equation. It is shown that the third magnetization equation yields a quite satisfactory description of magnetiviscosity in the entire region of magnetic-field strength and the flow vorticity. This equation turns out to be valid—like the microscopically derived equation but unlike the former phenomenological equation—even far from equilibrium, and so it should be recommended for further applications.

Original languageEnglish
Pages (from-to)4
Number of pages1
JournalPhysical Review E
Volume64
Issue number6
DOIs
StatePublished - 1 Jan 2001

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