Systematic analysis of ferrofluid: a visualization review, advances engineering applications, and challenges

Yang, Wenrong; Zhang, Yumeng; Yang, Xiaoguang; Sun, Changxing; Chen, Ying

doi:10.1007/s11051-022-05477-5

Cited by 10 publications

(10 citation statements)

References 239 publications

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“…The capillary wave was generated by the interaction of the acoustic wave and the free liquid surface. 23 An alternating voltage of given frequency ν and amplitude was converted by a loudspeaker (5) into an acoustic wave, which was conducted to the FF-free surface by means of a waveguide (6). The waveguide passed through a narrow slot in the protective housing.…”

Section: ■ Experimental Setupmentioning

confidence: 99%

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Does Magnetic Field Influence the Surface Tension of Ferrofluid?

Khokhryakova,

Shmyrov,

Mizeva

2024

Langmuir

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Studying the physical properties of ferrofluids is a challenging task, especially when conventional experimental techniques are adapted to the presence of a magnetic field. To date, there has been no definitive understanding of how the magnetic field affects the surface energy of ferrofluid interfaces. In this study, we perform a direct experimental investigation to assess the effect of magnetic fields on the surface tension of ferrofluids. For this purpose, a modified capillary wave technique was modified for use in the presence of an external magnetic field. A decrease in the wavelength of the capillary wave was observed when the magnetic field was oriented perpendicular to the ferrofluid surface, and an increase was recorded when the magnetic field was parallel. We note that the capillary wave pattern elongates along the magnetic field force lines. The observed effect is attributed to the varying influence of the magnetic field along and across the propagating capillary wave. Analysis of the dispersion relation and evaluation of the impacts of various mechanisms influencing capillary waves revealed, that the changes in the surface tension of ferrofluids in the presence of a magnetic field are responsible for the observed behavior. It is shown that the surface tension of the MK 8-40 ferrofluid gradually increases with the applied magnetic field and reaches a grouth up to 10% in a magnetic field of ∼10 kA/m. Thus, the surface tension is found to be influenced by an external magnetic field.

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Section: ■ Experimental Setupmentioning

confidence: 99%

“…The introduction of biocompatible FFs on the basis of water has given rise to a rapidly growing field of medical applications . Currently, FF is utilized for targeted drug delivery and hyperthermia tumor treatment, and it has a wide range of potential applications. − …”

Section: Introductionmentioning

confidence: 99%

Does Magnetic Field Influence the Surface Tension of Ferrofluid?

Khokhryakova,

Shmyrov,

Mizeva

2024

Langmuir

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“…14 Since then, a lot of efforts have been devoted to further develop these MF dampers. 15 In 1978, a viscous-fluid inertia damper based on the levitation characteristics of MFs was proposed and employed to dampen the rotary vibration of stepping motor shafts. 16 Bashtovoi, the founder of MFs used in spacecraft vibration reduction, presented the MF dynamic absorber in 2002.…”

Section: Introductionmentioning

confidence: 99%

“…This was the first successful use of the MF damper in aerospace . Since then, a lot of efforts have been devoted to further develop these MF dampers . In 1978, a viscous-fluid inertia damper based on the levitation characteristics of MFs was proposed and employed to dampen the rotary vibration of stepping motor shafts .…”

Section: Introductionmentioning

confidence: 99%

Bionic Structure Inspired by Tree Frogs to Enhance Damping Performance

Yang

Wiercigroch

et al. 2023

ACS Appl. Mater. Interfaces

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Magnetic fluid shock absorbers (MFSAs) have been successfully utilized to eliminate microvibrations of flexible spacecraft structures. The method of enhancing the damping efficiency of MFSAs has always been a critical issue. To address this, we drew inspiration from the tree frog’s toe pads, which exhibit strong friction due to their unique surface structure. Using 3D printing, we integrated bionic textures copied from tree frog’s toe pad surfaces onto MFSAs, which is the first time to combine bionic design and MFSAs. Additionally, this is also the first time that surface textures have been applied to MFSAs. However, we also had to consider practical engineering applications and manufacturing convenience, so we modified the shape of bionic textures. To do so, we used an edge extraction algorithm for image processing and obtained recognition results. After thorough consideration, we chose hexagon as the shape of surface textures instead of bionic textures. For theoretical analysis, a magnetic field–flow field coupling dynamic model for MFSAs was built for the first time to simulate the magnetic fluid (MF) flow in one oscillation cycle. Using this model, the flow rate contours of the MF were obtained. It was observed that textures cause vortexes to form in the MF layer, which produced an additional velocity field. This increased the shear rate, ultimately leading to an increase in flow resistance. Finally, we conducted vibration reduction experiments and estimated damping characteristics of the proposed MFSAs to prove the effectiveness of both bionic texture and hexagon surface textures. Fortunately, we concluded that hexagon surface textures not only improve the damping efficiency of MFSAs but also require less MF mass.

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“…11 Therefore, this damper has the advantages of both and only requires less electrical energy to tune the damping performance. The current research on semi-active dampers focuses on smart materials, 12 for instance, magnetic fluid (MF), 13 magnetorheological fluid (MRF), 14 Since the smart materials can be adjusted according to external needs, they have a wide range of applications in damping, lubrication, etc. 15,16 Due to the large yield stress and damping force of MRF, it has been widely used in the field of damping, for instance, MRF dampers with double annular damping gap, 17 Integral MRF dampers, 18 MRF dampers for FUZZY-PID controller.…”

Section: Introductionmentioning

confidence: 99%

Self-tuning vibration reduction study of magnetic fluid rolling-ball damper based on PSO-FUZZY-PID

Yang

Zhang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

Self Cite

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For towering structures under complex time-varying excitation, the tuned magnetic fluid rolling-ball dampers (TMFRBD) cannot achieve self-tuning damping. In this paper, considering the operating characteristics of the TMFRBD, a damper self-tuning control algorithm, namely particle swarm optimization (PSO)-FUZZY-PID, is proposed for real-time adjustment of the intrinsic frequency of TMFRBD, which can greatly improve the damping effect, namely self-tuning magnetic fluid rolling-ball dampers (STMFRBD). Firstly, the equivalent dynamics model of the damping system is established, deriving the structural dynamic amplitude response as a function of the excitation frequency to structural frequency ratio. Different frequency tracking schemes of the damper are compared and analyzed. Then magnetic field simulations and magnetic fluid magnetic property measurements are performed for the dampers, respectively. Secondly, the self-tuning PSO-FUZZY-PID control algorithm is designed to improve the damping performance of STMFRBD under time-varying excitation by optimizing factors of the FUZZY-PID controller with PSO. To confirm the effectiveness of the damper self-tuning control algorithm, the frequency tracking of dampers with different control algorithms under time-varying excitation is compared. The results show that the damper’s frequency can be tuned quickly and accurately tracking excitation frequency by PSO-FUZZY-PID. Finally, the simulation and experimental results of STMFRBD and passive mass damper (PMD) under different loads are analyzed, and the structural amplitude response is analyzed using the Hilbert-Huang transform (HHT). In addition, the damping of STMFBD and TMFBD under different loads is compared. The results show that STMFRBD has better vibration-damping performance than PMD and TMFRBD.

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Systematic analysis of ferrofluid: a visualization review, advances engineering applications, and challenges

Cited by 10 publications

References 239 publications

Does Magnetic Field Influence the Surface Tension of Ferrofluid?

Does Magnetic Field Influence the Surface Tension of Ferrofluid?

Bionic Structure Inspired by Tree Frogs to Enhance Damping Performance

Self-tuning vibration reduction study of magnetic fluid rolling-ball damper based on PSO-FUZZY-PID

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