Experimental error analysis of measuring the magnetic self-levitation force experienced by a permanent magnet suspended in magnetic fluid with a nonmagnetic rod

Yu, Jun; Chen, Jiawei; Li, Decai

doi:10.1016/j.jmmm.2018.08.080

Cited by 12 publications

(7 citation statements)

References 22 publications

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“…The simulation setup used in this study is related directly to the research already conducted by the authors of the text, which is well covered, both theoretically and experimentally [26]. For details about the experimental verification, the reader is directed to [23]. However, the model's dimensions and material properties employed in the presented model corresponded to the ones in [26] (Table 1).…”

Section: Fem Model and Simulation Setupmentioning

confidence: 99%

“…The geometrical proportions and virtual experiment setups are shown in Figure 5. The materials' properties listed in Table 1 were chosen to fit well with the ones in [23,26]. The meanings of the symbols in Table 1 are as follows: ρ is the material or substance density; µ r is the relative permeability; B rem and H c are the remanence and coercive force of the PM, respectively; and χ i is the initial magnetic susceptibility defined at low magnetic field intensity.…”

Section: Fem Model and Simulation Setupmentioning

confidence: 99%

“…While the PM consists of a rare earth hard magnetic material, its slope in the B-H characteristic is very close to unity. Actually, in reality, the value of the PM's relative permeability µ r is about 1.05, but the unity value is applied in the simulations to agree with the one in [23]. The mesh size within the PM and container was chosen so as to provide an accurate field approximation, especially because the used software, FEMM 4.2, deals only with the first order triangular elements.…”

Section: Fem Model and Simulation Setupmentioning

confidence: 99%

“…It is somewhat worth mentioning that the early stage SOB force measurement technique was based on the tensile force of the rope attached to the top of the magnet within the ferrofluid [22]. A series of scientific reports published by Yu and some other authors were dedicated to extensive theoretical consideration of SOB, but the experimental setup was still based on the Dynamometer and Vernier caliper [8,[23][24][25].…”

Section: Introductionmentioning

confidence: 99%

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Contactless Determination of a Permanent Magnet’s Stable Position within Ferrofluid

et al. 2022

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The paper deals with the contactless detection of a rod permanent magnet’s position within a ferrofluid. The working principle of the proposed approach is grounded on the solenoidal nature of the field lines. For the line detection technique analyzed in this article, where the magnetic field is scanned along the line parallel to the magnet’s axial direction, the center of the magnet corresponds to the point on the line where the radial component of the magnetic field vanished. The concept introduced here was evaluated numerically, where the results showed a promising perspective for the technique to be employed in practice. In contrast to the X-ray or Vernier-caliper-based technique, the one proposed here is somewhat more suitable for employment in applications where simplicity and robustness are of vital importance.

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Section: Fem Model and Simulation Setupmentioning

confidence: 99%

Section: Fem Model and Simulation Setupmentioning

confidence: 99%

Section: Fem Model and Simulation Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Contactless Determination of a Permanent Magnet’s Stable Position within Ferrofluid

et al. 2022

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“…In the previous studies, for example, in [7,[25][26][27][28][29], the magnetic levitation force experienced by a cylindrical magnet in a cylindrical container filled with magnetic fluid was studied without considering the influence of the radial eccentricity on the axial magnetic levitation force. In [22], the radial magnetic levitation force acting on the cylindrical magnet was studied, but the relationship between radial eccentricity and axial magnetic levitation force was not discussed.…”

Section: Introductionmentioning

confidence: 99%

Research on the Axial Magnetic Levitation Force Acting on the Ring Magnet Suspended in Magnetic Fluid : Considering a Radial Eccentricity

Yu¹,

Li²,

Di³

et al. 2019

JMAG

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The self-suspension of magnet in magnetic fluid has been widely used in micromechanical systems, sensors, and dampers. The magnetic field associated with the ring magnet is obtained by numerical calculation and simulation through which the axial magnetic levitation force is calculated, and the numerical calculation, simulation, and experimental results agree with each other. The influence of the radial eccentricity of the ring magnet on the axial magnetic levitation force is studied, the ring magnet will experience a maximum axial magnetic levitation force without radial eccentricity. With the increase of radial eccentricity and the decrease of the distance between the bottom of the ring magnet and container, the axial magnetic levitation force will continue to decrease. But it is worth noting that the magnitude of the change caused by radial eccentricity is negligible compared to that of the axial magnetic levitation force.

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Flexible Ferrofluids: Design and Applications

et al. 2019

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Ferrofluids, also known as ferromagnetic particle suspensions, are materials with an excellent magnetic response, which have attracted increasing interest in both industrial production and scientific research areas. Because of their outstanding features, such as rapid magnetic reaction, flexible flowability, as well as tunable optical and thermal properties, ferrofluids have found applications in various fields, including material science, physics, chemistry, biology, medicine, and engineering. Here, a comprehensive, in‐depth insight into the diverse applications of ferrofluids from material fabrication, droplet manipulation, and biomedicine to energy and machinery is provided. Design of ferrofluid‐related devices, recent developments, as well as present challenges and future prospects are also outlined.

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Experimental error analysis of measuring the magnetic self-levitation force experienced by a permanent magnet suspended in magnetic fluid with a nonmagnetic rod

Cited by 12 publications

References 22 publications

Contactless Determination of a Permanent Magnet’s Stable Position within Ferrofluid

Contactless Determination of a Permanent Magnet’s Stable Position within Ferrofluid

Research on the Axial Magnetic Levitation Force Acting on the Ring Magnet Suspended in Magnetic Fluid : Considering a Radial Eccentricity

Flexible Ferrofluids: Design and Applications

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