Flow and energy dissipation in a magnetic fluid drop around a permanent magnet

Баштовой, В. Г.; Lavrova, O. A.; Mitkova, Teodora; Полевиков, В. К.; Tobiska, Lutz

doi:10.1016/j.jmmm.2004.11.060

Cited by 10 publications

(10 citation statements)

References 2 publications

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“…Krakov [44] studied the radial flow of ferrofluid under the piston of a ferrofluid dynamic vibration absorber, and has proved that viscous properties of ferrofluid play an important role in the intensity of energy dissipation. Afterwards, Bashtovoi et al [45][46][47][48][49] conducted further studies on ferrofluid dynamic vibration absorbers, in which the ferrofluid played both the role of support and the damping element.…”

Section: Ferrofluid Dynamic Vibration Absorbersmentioning

confidence: 99%

“…This type of dynamic vibration absorber was expected to be used in spacecraft technology. Subsequently, these researchers investigated the support function of ferrofluid experimentally and numerically [47], and they devoted to the hydrodynamic and dissipation processes in absorber systems with Finite Element Method [48]. Figure 15 exhibits a passive absorber, although Fig.…”

Section: Ferrofluid Dynamic Vibration Absorbersmentioning

confidence: 99%

See 1 more Smart Citation

Damping Applications of Ferrofluids: A Review

Huang¹,

Yao²,

Zhang³

et al. 2017

Journal of Magnetics

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Ferrofluids are a special category of smart nanomaterials which shows normal liquid behavior coupled with superparamagnetic properties. One of the earliest and most prospective applications of ferrofluids is in damping, which has prominent advantages compared with conventional damping devices: simplicity, flexibility and reliability. This paper presents the basic principles that play a major role in the design of ferrofluid damping devices. The characteristics of typical ferrofluid damping devices including dampers, vibration isolators, and dynamic vibration absorbers are compared and summarized, and then recent progress of vibration energy harvesters based on ferrofluid is briefly described. Additionally, we proposed a novel ferrofluid dynamic vibration absorber in this paper, and its damping efficiency was verified with experiments. In the end, the critical problems and research directions of the ferrofluid damping technology in the future are raised.

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Section: Ferrofluid Dynamic Vibration Absorbersmentioning

confidence: 99%

Section: Ferrofluid Dynamic Vibration Absorbersmentioning

confidence: 99%

Damping Applications of Ferrofluids: A Review

Huang¹,

Yao²,

Zhang³

et al. 2017

Journal of Magnetics

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“…Then, having in mind a fixed given fluid volume we find from ( 9) the shape of the free surface F . Finally, the flow structure is determined by solving the Navier-Stokes equations ( 4), (5) in the constructed fluid domain F . This type of model has been applied in [5] to study numerically hydrodynamic and dissipative processes in dissipative systems consisting of a permanent magnet surrounded by a ferrofluid drop as damping medium; see figure 3.…”

Section: Dominating Magnetic Fieldsmentioning

confidence: 99%

“…Finally, the flow structure is determined by solving the Navier-Stokes equations ( 4), (5) in the constructed fluid domain F . This type of model has been applied in [5] to study numerically hydrodynamic and dissipative processes in dissipative systems consisting of a permanent magnet surrounded by a ferrofluid drop as damping medium; see figure 3. The ferrofluid drop is placed between two plates with a plane-parallel motion inducing a certain flow structure within the drop.…”

Section: Dominating Magnetic Fieldsmentioning

confidence: 99%

Numerical treatment of free surface problems in ferrohydrodynamics

Lavrova

Matthies

Mitkova

et al. 2006

J. Phys.: Condens. Matter

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The numerical treatment of free surface problems in ferrohydrodynamics is considered. Starting from the general model, special attention is paid to field-surface and flow-surface interactions. Since in some situations these feedback interactions can be partly or even fully neglected, simpler models can be derived. The application of such models to the numerical simulation of dissipative systems, rotary shaft seals, equilibrium shapes of ferrofluid drops, and pattern formation in the normal-field instability of ferrofluid layers is given. Our numerical strategy is able to recover solitary surface patterns which were discovered recently in experiments.

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“…In 1978, a viscous-fluid inertia damper that utilized the levitation characteristics of a ferrofluid was created and used to dampen the rotary shaft of a stepping motor [46]. Subsequently, scholars have conducted research on the levitation force [47,48] and energy dissipation [49,50]. An MF dynamic absorber was proposed based on a related theoretical study [51], which could reduce the vibration of flexible overhanging structures on spacecraft.…”

Section: Introductionmentioning

confidence: 99%

Typical dampers and energy harvesters based on characteristics of ferrofluids

Han

et al. 2022

Friction

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Ferrofluids are a type of nanometer-scale functional material with fluidity and superparamagnetism. They are composed of ferromagnetic particles, surfactants, and base liquids. The main characteristics of ferrofluids include magnetization, the magnetoviscous effect, and levitation characteristics. There are many mature commercial ferrofluid damping applications based on these characteristics that are widely used in numerous fields. Furthermore, some ferrofluid damping studies such as those related to vibration energy harvesters and biomedical devices are still in the laboratory stage. This review paper summarizes typical ferrofluid dampers and energy harvesting systems from the 1960s to the present, including ferrofluid viscous dampers, ferrofluid inertia dampers, tuned magnetic fluid dampers (TMFDs), and vibration energy harvesters. In particular, it focuses on TMFDs and vibration energy harvesters because they have been the hottest research topics in the ferrofluid damping field in recent years. This review also proposes a novel magnetic fluid damper that achieves energy conversion and improves the efficiency of vibration attenuation. Finally, we discuss the potential challenges and development of ferrofluid damping in future research.

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Flow and energy dissipation in a magnetic fluid drop around a permanent magnet

Cited by 10 publications

References 2 publications

Damping Applications of Ferrofluids: A Review

Damping Applications of Ferrofluids: A Review

Numerical treatment of free surface problems in ferrohydrodynamics

Typical dampers and energy harvesters based on characteristics of ferrofluids

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