Magnetorheological properties of some ferrofluids

Τimko, M.; Zentko, A.; Zentková, M.; Koneracká, M.; Kellnerova, V.; Zentková, A.; Stepan, M.; Barbora, J.

doi:10.1109/20.312217

Cited by 8 publications

(5 citation statements)

References 8 publications

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“…Since the control and handling of the flow and energy transport processes in the magnetic fluid are possible by using an external magnetic field, the magnetic fluid expanded into thermal engineering during the past decade besides these applications (Li and Xuan 2009), but very few research are available about the viscosity of different nanofluids and ferrofluids. Some investigations measured the viscosity of the magnetic fluids (Graham 1981;Timko et al 1994;Wagh and Avashia 1996;Patel et al 2003;Li et al 2005;Hong et al 2007;Ren et al 2008). They exposed that the viscosity of the magnetic fluid is greater than that of the base liquid in both the absence and presence of the external magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations on the Viscosity of Magnetic Nanofluids under the Influence of Temperature, Volume Fractions of Nanoparticles and External Magnetic Field

Malekzadeh

Pouranfard

Hatami

et al. 2016

JAFM

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This article investigates the effect of magnetic field on the viscosity of Fe 3 O 4 -water magnetic nanofluid experimentally. Experiments were done in the volume fraction range 0 to 1 vol% and the temperature ranges from 25 to 45 ˚C. The results showed that the viscosity increased with increasing of nanoparticle volume fractions and decreased with temperature enhancement with or without of magnetic field. Also, it is observed that the viscosity of the magnetic nanofluid increases with enhancement of magnetic field strength. Thus, magnetic field is a basic factor that influences the viscosity of the magnetic nanofluids and magnetic nanofluid flow can be controlled by applying a magnetic field.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigations on the Viscosity of Magnetic Nanofluids under the Influence of Temperature, Volume Fractions of Nanoparticles and External Magnetic Field

Malekzadeh

Pouranfard

Hatami

et al. 2016

JAFM

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“…e magnetic materials have been used in various applications in medical science, e.g., magnetic resonance imaging (MRI), sustained transfer of drugs to appropriate target organs/cells, cell isolation, biofluid detoxification, tissue repair, and hyperthermia. ese magnetic nanoparticles show super paramagnetism phenomena and do not retain magnetism after the supply of the magnetic field, which offers the advantage of particle aggregation [18,[23][24][25][26]. e magnetic particles derived from magnetic transition metals (iron, nickel, and cobalt) are readily oxidized, whereas the iron oxide-like magnetite (Fe 3 O 4 ) form is more stable against oxidation.…”

Section: Introductionmentioning

confidence: 99%

“…Synthesis and application of magneto-rheological fluid have been interesting studies from the past couple of decades [11,25,31,32]. e main rise in this area is because of its impressive change in viscosity property under the applied magnetic field (Bingham plasticity).…”

Section: Introductionmentioning

confidence: 99%

The Investigation of Mixed Ferrofluids Containing Iron Oxide nanoparticles and Microspheres

Ganachari

Patil

Banapurmath

et al. 2021

Advances in Materials Science and Engineering

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The aim of the present work is the synthesis and characterization of iron oxide (Fe3O4) nanoparticles. These nanoparticles are coated with oleic acid and polyvinyl butyral and mixed with microspheres and further developed ferrofluids with silicon oil. Studies of the performance of the nanoparticles in these ferrofluids with and without coating agents were carried out. The nanoparticles were synthesized using the chemical co-precipitation technique and coated with oleic acid and polyvinyl butyral, and it further mixed with microsphere ferrofluids and developed using silicon oil. The prepared Fe3O4 nanoparticles and their coated forms of oleic acid and polyvinyl butyral were mixed with microspheres; furthermore, ferrofluids were developed with silicon oil. All forms of these ferrofluids are characterized for morphology and phase purity (SEM, XRD, and FTIR). The iron oxide (Fe3O4) nanoparticles have shown different magnetic properties, differentiating macroscopic iron oxide in suspended particles. The ratio of surface to volume increases along with the decrease in atomic size, essential for assessing the surface morphological properties. The magneto-rheological (MR) fluids were determined, and shear stress of Expancel microsphere mixed iron oxide nanoparticle with and without them was found almost equal. However, the ferrofluid with PVB coated nanoparticles and microspheres emerged as a stable rheological ferrofluid, sustaining high shear stress and low viscosity with increasing shear rate. Also, shear rates up to 650 s−1 have been observed, showing very high shear stress withstanding capacity. The stability and performance of the magnetic colloidal ferrofluids depend on the thermal contribution and the balance between attractive/repulsive interactions.

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“…An experimental approach is necessary to determine such a property. By taking the magnetic field into account, some investigations [4][5][6][7][8][9][10] were focused on measurements of the viscosities of magnetic fluids. Experimental results revealed that the viscosity of the magnetic fluid is greater than that of the original carrier liquid independent of the presence of a magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Measurement of the Viscosity of Dilute Magnetic Fluids

Xuan

Wang

2006

Int J Thermophys

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The capillary tube viscometer is used to measure the viscosity of aqueous magnetic fluids under the influence of parallel and perpendicular magnetic fields. The effects of the volume fraction of the suspended magnetic particles, the concentration of surfactants, and the external magnetic field strength, as well as the orientation, on the viscosity of the magnetic fluid are analyzed. The experimental results show that the viscosity of the sample magnetic fluids increases with increases in the concentrations of suspended magnetic particles and surfactants. The external magnetic field is also an important factor that affects the viscosity of the magnetic fluid. The viscosity first increases with the magnetic field and finally approaches a constant as the magnetization attains a saturation state. For the same magnetic fluid, the viscosity in a perpendicular magnetic field is larger than that in a parallel magnetic field for the same magnetic field.

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Magnetorheological properties of some ferrofluids

Cited by 8 publications

References 8 publications

Experimental Investigations on the Viscosity of Magnetic Nanofluids under the Influence of Temperature, Volume Fractions of Nanoparticles and External Magnetic Field

Experimental Investigations on the Viscosity of Magnetic Nanofluids under the Influence of Temperature, Volume Fractions of Nanoparticles and External Magnetic Field

The Investigation of Mixed Ferrofluids Containing Iron Oxide nanoparticles and Microspheres

Measurement of the Viscosity of Dilute Magnetic Fluids

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