Spin-up flow in non-small magnetic fields: Numerical evaluation of the predictions of the common magnetization relaxation equations
| Autor: | Carlos Rinaldi, David Fuentes-Díaz, Arlex Chaves-Guerrero, Víctor A. Peña-Cruz |
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| Rok vydání: | 2017 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics Ferrofluid Rotating magnetic field Condensed matter physics Magnetic energy Mechanical Engineering Demagnetizing field Computational Mechanics Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas Magnetic field Magnetic anisotropy Magnetization Mechanics of Materials 0103 physical sciences Magnetic pressure 010306 general physics |
| Zdroj: | Physics of Fluids. 29:073102 |
| ISSN: | 1089-7666 1070-6631 |
| DOI: | 10.1063/1.4993471 |
| Popis: | The flow of a ferrofluid between two parallel infinitely long plates generated by a rotating magnetic field has been studied analytically and numerically using spin diffusion theory for a broad range of frequencies and intensities of the magnetic field. This work was motivated by interest in obtaining better agreement between the theoretical predictions and the experimental observations of the dependence of the flow magnitude on the amplitude and frequency of the magnetic field. These discrepancies have been attributed to the use of asymptotic solutions to assess velocity profiles obtained to moderate magnetic field strength and to the need to use a more accurate magnetization equation to high amplitudes and frequencies of the magnetic field. For such reasons, the objective of this work was to evaluate the effect of the magnetization equations derived by Shliomis [Sov. Phys. JETP 34, 1291 (1972)] (Sh-72) and by Martsenyuk, Raikher, and Shliomis [Sov. Phys. JETP 38, 413 (1974)] (MRSh-74) on the flow predic... |
| Databáze: | OpenAIRE |
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