Abstract
In this work the study of viscosity is presented for a magnetorheological fluid made from iron oxides micrometre, under an external magnetic field. The material was characterized by magnetic loops in a vibrating sample magnetometer and its crystal structure by X-ray diffraction. The results show that saturation magnetization and coercive field have dependence with the powder size. The material has different crystal structure which lattice parameters were determined by Rietveld refinement. The viscosity of the magnetorheological fluid was measured by a viscometer with rotational symmetry with and without external field. This result evidence a dependency on the size, percentage iron oxide and the applied magnetic field, it is due to the hydrodynamic volume of iron oxide interacts with the external magnetic field, increasing the flow resistance.
Highlights
The results show that saturation magnetization and coercive field have dependence with the powder size
The magnetorheological fluids are non-Newtonian fluids consisting of magnetic particles, example magnetite, dispersed in a liquid carrier that can change its rheological properties under application of an external magnetic field
As it is increase the size of the oxide, saturation magnetization lowers (Figure 2) which values are within the range of a magnetically soft material as shown in Table 2, which is an important factor in the development of magnetorheological fluids
Summary
- Effects of magnetic field on the spreading dynamics of an impinging ferrofluid droplet Abrar Ahmed et al. - One-way sound propagation via spatiotemporal modulation of magnetorheological fluid Aditya Nanda and M. This content was downloaded from IP address 200.24.16.225 on 20/11/2018 at 15:41. H A Fonseca, E Gonzalez, J Restrepo, C A Parra and C Ortiz Universidad Pedagógica y Tecnológica de Colombia, Tunja, Boyacá, Colombia. 2 Universidad de Antioquia, Medellín, Antioquia, Colombia H A Fonseca, E Gonzalez, J Restrepo, C A Parra and C Ortiz Universidad Pedagógica y Tecnológica de Colombia, Tunja, Boyacá, Colombia. 2 Universidad de Antioquia, Medellín, Antioquia, Colombia
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