Travelling waves on a free surface of a magnetic fluid layer

Zimmermann, Klaus; Zeidis, Igor; Налетова, В.А.; Турков, В.А.

doi:10.1016/j.jmmm.2003.12.966

Cited by 14 publications

(7 citation statements)

References 5 publications

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“…7 Researchers have pursued many studies on nano-magnetic fluids. 8,9 In particular, they have achieved success in the manufacture and production of nano-magnetic fluids. Wei et al 10 and Hu 11 applied chemical precipitation methods to produce nanomagnetic fluids of a 50 nm particle size for Fe 3 O 4 .…”

Section: Introductionmentioning

confidence: 99%

Investigation of friction power consumption and performance of a water turbine seal based on the imbalanced rotation of nano-magnetic fluids

Zhang

et al. 2018

Advances in Mechanical Engineering

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The calculation of friction power consumption and the performance of nano-magnetic fluids in sealed water turbines have proved to be hurdles in studies on nano-magnetic fluidic device designs and applications. In this article, we investigate the imbalanced rotation O 6 ¼ 1/2 (rot y) of a nano-magnetic fluid suspended in a paramagnetic carrier liquid. Through Langevin and Navier-Stokes equations, the formula for the theoretical friction power consumption can be calculated for the magnetic particles in the nano-magnetic fluid. The calculated value shows a well agreement with the test result. Further simulation indicates that the magnetic field gradient DB sum between the tooth space (wave trough) and the pole tooth (wave crest) has the most influence on the imbalanced rotation in a sealed nano-magnetic fluid device in a water turbine. Specifically, the larger the DB sum , the more obviously imbalanced the nano-magnetic fluid rotation will be at that location; and the imbalanced torque will be larger, so the seal differential pressure will be as well. As a result, the sealing capacity will be better and the frictional power consumption will be larger; and the reverse is also true. This study result can serve as a reference for designs for sealed nano-magnetic fluidic devices for water turbines, which is significant, especially given the heat from friction power consumption in the water turbine and its cooling equipment.

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Section: Introductionmentioning

confidence: 99%

Investigation of friction power consumption and performance of a water turbine seal based on the imbalanced rotation of nano-magnetic fluids

Zhang

et al. 2018

Advances in Mechanical Engineering

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“…Thin layered flows of heavy viscous magnetic fluids on horizontal or cylindrical substrates in traveling magnetic fields were investigated by [13,14]. The surface tension was taken into account.…”

Section: Introductionmentioning

confidence: 99%

Material transport of a magnetizable fluid by surface perturbation

Böhm

Налетова

Popp

et al. 2015

Journal of Magnetism and Magnetic Materials

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“…In Refs. [6,7] the motion of an incompressible magnetic fluid layer on an undeformable substrate, produced by a nonuniform magnetic field, is analyzed within the framework of the viscous fluid model. In Refs.…”

Section: Introductionmentioning

confidence: 99%

“…In Refs. [6,7] the motion of a media under layer surface is neglected. Here the two-layers flow of the viscous magnetizable fluids (nanosuspensions) in a magnetic field is studied.…”

Section: Introductionmentioning

confidence: 99%