The Influence of Current Magnitudes and Profiles on the Sedimentation of Magnetorheological Fluids: An Experimental Work
Abstract
:1. Introduction
2. Materials and Methods
2.1. Magnetic Analysis
2.2. Experimental Method
3. Results and Discussion
3.1. Hall Sensor Measurement
3.2. Sedimentation Rate
4. Conclusions
- (1)
- The square current wave shows slower sedimentation compared to the sine wave. When the intensity of 1 A current input was applied, the average sedimentation rate under the square wave was observed at 98.61%, while the average sedimentation rate under the square wave was 97.83%.
- (2)
- The higher intensity of the applied current input resulted in a stronger electromagnetic field, which could slow down the sedimentation of MR fluids caused by the strongly formed chain-like structure. The minimum current input for preventing sedimentation was identified as 1.5 A, which generated magnetic flux density around 0.073 T.
- (3)
- The walls on the smaller tube diameter could hinder the movement of the particles resulting in slowing down the sedimentation rate.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Parameters | Description | Value | Unit |
---|---|---|---|
W | Magnetic Core Width | 19 | mm |
L | Magnetic Core Length | 118 | mm |
l1 | Magnetic Core Length 1 | 50.5 | mm |
l2 | Magnetic Core Length 2 | 88 | mm |
R1 | Bobbin Outer Radius 1 | 35 | mm |
R2 | Bobbin Inner Radius 2 | 10 | mm |
la | Bobbin Total Length | 78 | mm |
lb | Bobbin Length | 64 | mm |
r | Coil Radius | 0.5 | mm |
N | Coil Winding | 500 | turns |
Sair | Air Gap Length | 2 | mm |
Dt | MR Fluids Diameter | 15 | mm |
Parameters | Value | Unit |
---|---|---|
Viscosity | 0.112 | Pa·s |
Density | 2.95–3.15 | g/cm3 |
Solid Content by Weight | 80.90 | W% |
Flash Point | >150 | °C |
Temperature | −40 to +130 | °C |
Wave Type | Current Input | Frequency |
---|---|---|
Baseline | - | - |
Sine Wave | 0.5 A | 0.1 Hz |
Sine Wave | 1 A | 0.1 Hz |
Sine Wave | 1.5 A | 0.1 Hz |
Sine Wave | 2 A | 0.1 Hz |
Square Wave | 1 | 0.1 Hz |
Square Wave | 2A | 0.1 Hz |
Wave Type | Current Input | Frequency |
---|---|---|
Baseline | - | - |
Sine Wave | 1 A | 0.1 Hz |
Sine Wave | 2 A | 0.1 Hz |
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Maharani, E.T.; Seo, M.-W.; Sohn, J.W.; Oh, J.-S.; Choi, S.-B. The Influence of Current Magnitudes and Profiles on the Sedimentation of Magnetorheological Fluids: An Experimental Work. Magnetochemistry 2024, 10, 18. https://doi.org/10.3390/magnetochemistry10030018
Maharani ET, Seo M-W, Sohn JW, Oh J-S, Choi S-B. The Influence of Current Magnitudes and Profiles on the Sedimentation of Magnetorheological Fluids: An Experimental Work. Magnetochemistry. 2024; 10(3):18. https://doi.org/10.3390/magnetochemistry10030018
Chicago/Turabian StyleMaharani, Elliza Tri, Myeong-Won Seo, Jung Woo Sohn, Jong-Seok Oh, and Seung-Bok Choi. 2024. "The Influence of Current Magnitudes and Profiles on the Sedimentation of Magnetorheological Fluids: An Experimental Work" Magnetochemistry 10, no. 3: 18. https://doi.org/10.3390/magnetochemistry10030018