Modelling the size separation of NdFeB magnetic microparticles by magnetophoresis and gravity settling
2015
Authors
Radulović, KatarinaRadovanović, Filip
Randjelović, Danijela
Jović, Vesna
Lamovec, Jelena
Vasiljević-Radović, Dana
Jakšić, Zoran
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Properties of sintered NdFeB magnets strongly depend on granulation and size distribution of constituent particles, which requires an efficient method for their separation into relatively narrow size fractions. We investigated two methods of magnetic particle separation from a mixture with different sizes using simulation by finite element method: magnetophoresis and gravity settling. In the case of magnetophoresis magnetic particles ranging in diameter from 1 to 10 m were deflected from the direction of continuous laminar flow by a perpendicular magnetic field. Larger particles were deflected from the direction of laminar flow more than smaller particles. The applied flow rate and strength and gradient of the applied magnetic field were the key parameters in controlling the deflection. The gravity settling model simulated spherical particles falling in heptane. Particles of various sizes were divided according to the time they needed to reach the bottom. The model used an axially sym...metric fluid-flow simulation in a moving coordinate system connected with the particle, coupled with an ordinary differential equation for the force balance of the particle (gravity and drag force). The grain accelerated from standstill and rapidly reached its terminal velocity. This velocity was approximately proportional to the square of the particle radius, which led to clear separation of 5-10 um particles from those with a diameter of 1 um.
Keywords:
NdFeB particles / separation / gravity settling / magnetophoresisSource:
59. Konferencija za elektroniku, telekomunikacije, računarstvo, automatiku i nuklearnu tehniku, Srebrno jezero, 8-11. juna, 2015. godine [i] 2nd International Conference on Electrical, Electronic and Computing Engineering IcETRAN 2015 Silver Lake (Srebrno jezero), Serbia, June 8-11, 2015: Proceedings, 2015Publisher:
- Belgrade : ETRAN Society
Funding / projects:
- New permanent magnets for electric-vehicle drive applications (EU-FP7-605348)
- Micro- Nanosystems and Sensors for Electric Power and Process Industry and Environmental Protection (RS-MESTD-Technological Development (TD or TR)-32008)
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Institution/Community
IHTMTY - CONF AU - Radulović, Katarina AU - Radovanović, Filip AU - Randjelović, Danijela AU - Jović, Vesna AU - Lamovec, Jelena AU - Vasiljević-Radović, Dana AU - Jakšić, Zoran PY - 2015 UR - http://dais.sanu.ac.rs/123456789/787 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/2594 AB - Properties of sintered NdFeB magnets strongly depend on granulation and size distribution of constituent particles, which requires an efficient method for their separation into relatively narrow size fractions. We investigated two methods of magnetic particle separation from a mixture with different sizes using simulation by finite element method: magnetophoresis and gravity settling. In the case of magnetophoresis magnetic particles ranging in diameter from 1 to 10 m were deflected from the direction of continuous laminar flow by a perpendicular magnetic field. Larger particles were deflected from the direction of laminar flow more than smaller particles. The applied flow rate and strength and gradient of the applied magnetic field were the key parameters in controlling the deflection. The gravity settling model simulated spherical particles falling in heptane. Particles of various sizes were divided according to the time they needed to reach the bottom. The model used an axially symmetric fluid-flow simulation in a moving coordinate system connected with the particle, coupled with an ordinary differential equation for the force balance of the particle (gravity and drag force). The grain accelerated from standstill and rapidly reached its terminal velocity. This velocity was approximately proportional to the square of the particle radius, which led to clear separation of 5-10 um particles from those with a diameter of 1 um. PB - Belgrade : ETRAN Society C3 - 59. Konferencija za elektroniku, telekomunikacije, računarstvo, automatiku i nuklearnu tehniku, Srebrno jezero, 8-11. juna, 2015. godine [i] 2nd International Conference on Electrical, Electronic and Computing Engineering IcETRAN 2015 Silver Lake (Srebrno jezero), Serbia, June 8-11, 2015: Proceedings T1 - Modelling the size separation of NdFeB magnetic microparticles by magnetophoresis and gravity settling UR - https://hdl.handle.net/21.15107/rcub_dais_787 ER -
@conference{ author = "Radulović, Katarina and Radovanović, Filip and Randjelović, Danijela and Jović, Vesna and Lamovec, Jelena and Vasiljević-Radović, Dana and Jakšić, Zoran", year = "2015", abstract = "Properties of sintered NdFeB magnets strongly depend on granulation and size distribution of constituent particles, which requires an efficient method for their separation into relatively narrow size fractions. We investigated two methods of magnetic particle separation from a mixture with different sizes using simulation by finite element method: magnetophoresis and gravity settling. In the case of magnetophoresis magnetic particles ranging in diameter from 1 to 10 m were deflected from the direction of continuous laminar flow by a perpendicular magnetic field. Larger particles were deflected from the direction of laminar flow more than smaller particles. The applied flow rate and strength and gradient of the applied magnetic field were the key parameters in controlling the deflection. The gravity settling model simulated spherical particles falling in heptane. Particles of various sizes were divided according to the time they needed to reach the bottom. The model used an axially symmetric fluid-flow simulation in a moving coordinate system connected with the particle, coupled with an ordinary differential equation for the force balance of the particle (gravity and drag force). The grain accelerated from standstill and rapidly reached its terminal velocity. This velocity was approximately proportional to the square of the particle radius, which led to clear separation of 5-10 um particles from those with a diameter of 1 um.", publisher = "Belgrade : ETRAN Society", journal = "59. Konferencija za elektroniku, telekomunikacije, računarstvo, automatiku i nuklearnu tehniku, Srebrno jezero, 8-11. juna, 2015. godine [i] 2nd International Conference on Electrical, Electronic and Computing Engineering IcETRAN 2015 Silver Lake (Srebrno jezero), Serbia, June 8-11, 2015: Proceedings", title = "Modelling the size separation of NdFeB magnetic microparticles by magnetophoresis and gravity settling", url = "https://hdl.handle.net/21.15107/rcub_dais_787" }
Radulović, K., Radovanović, F., Randjelović, D., Jović, V., Lamovec, J., Vasiljević-Radović, D.,& Jakšić, Z.. (2015). Modelling the size separation of NdFeB magnetic microparticles by magnetophoresis and gravity settling. in 59. Konferencija za elektroniku, telekomunikacije, računarstvo, automatiku i nuklearnu tehniku, Srebrno jezero, 8-11. juna, 2015. godine [i] 2nd International Conference on Electrical, Electronic and Computing Engineering IcETRAN 2015 Silver Lake (Srebrno jezero), Serbia, June 8-11, 2015: Proceedings Belgrade : ETRAN Society.. https://hdl.handle.net/21.15107/rcub_dais_787
Radulović K, Radovanović F, Randjelović D, Jović V, Lamovec J, Vasiljević-Radović D, Jakšić Z. Modelling the size separation of NdFeB magnetic microparticles by magnetophoresis and gravity settling. in 59. Konferencija za elektroniku, telekomunikacije, računarstvo, automatiku i nuklearnu tehniku, Srebrno jezero, 8-11. juna, 2015. godine [i] 2nd International Conference on Electrical, Electronic and Computing Engineering IcETRAN 2015 Silver Lake (Srebrno jezero), Serbia, June 8-11, 2015: Proceedings. 2015;. https://hdl.handle.net/21.15107/rcub_dais_787 .
Radulović, Katarina, Radovanović, Filip, Randjelović, Danijela, Jović, Vesna, Lamovec, Jelena, Vasiljević-Radović, Dana, Jakšić, Zoran, "Modelling the size separation of NdFeB magnetic microparticles by magnetophoresis and gravity settling" in 59. Konferencija za elektroniku, telekomunikacije, računarstvo, automatiku i nuklearnu tehniku, Srebrno jezero, 8-11. juna, 2015. godine [i] 2nd International Conference on Electrical, Electronic and Computing Engineering IcETRAN 2015 Silver Lake (Srebrno jezero), Serbia, June 8-11, 2015: Proceedings (2015), https://hdl.handle.net/21.15107/rcub_dais_787 .