NUMERICAL STUDY ON EFFECT OF STRIP MAGNET GEOMETRIC CONFIGURATION ON SEPARATION BEHAVIORS OF MAGNETIC PARTICLES IN LAMINAR FLOW

LUO Wei; LI Pinyi; PENG Hui; YE Yong

doi:10.13205/j.hjgc.202211005

Volume 40 Issue 11

Nov. 2022

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LUO Wei, LI Pinyi, PENG Hui, YE Yong. NUMERICAL STUDY ON EFFECT OF STRIP MAGNET GEOMETRIC CONFIGURATION ON SEPARATION BEHAVIORS OF MAGNETIC PARTICLES IN LAMINAR FLOW[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(11): 32-40. doi: 10.13205/j.hjgc.202211005

Citation:

LUO Wei, LI Pinyi, PENG Hui, YE Yong. NUMERICAL STUDY ON EFFECT OF STRIP MAGNET GEOMETRIC CONFIGURATION ON SEPARATION BEHAVIORS OF MAGNETIC PARTICLES IN LAMINAR FLOW[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(11): 32-40. doi: 10.13205/j.hjgc.202211005

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NUMERICAL STUDY ON EFFECT OF STRIP MAGNET GEOMETRIC CONFIGURATION ON SEPARATION BEHAVIORS OF MAGNETIC PARTICLES IN LAMINAR FLOW

doi: 10.13205/j.hjgc.202211005

LUO Wei^1,2,
LI Pinyi^1,2,
PENG Hui^{1,2
,},
YE Yong^{1,2
,}

1. Engineering Research Center of the Ministry of Ecological Environment and Education in the Three Gorges Reservoir Area, Three Gorges University, Yichang 443002, China;
2. School of Water Conservancy and Environment, Three Gorges University, Yichang 443002, China

Received Date: 2022-04-07
Available Online: 2023-03-24

Abstract

Abstract

Enhancing the separation and recycling of magnetic particles or agglomerates in fluid by the applied magnetic field is a key problem in the open gradient magnetic separation technology. By establishing a numerical model, the effects of four arrangement modes of strip magnets (the axial alternating arrangement, the axial concurrent arrangement, the transverse alternating arrangement, and the transverse concurrent arrangement) and different magnetic end spacings on the particle capture rate were studied, and also the particle capture results were analyzed, in combination with the particle trajectory and the magnetic force distribution. At the same time, the ratio of magnet length to width, the effects of particle susceptibility, the fluid flow velocity, and the magnet magnetization on particle capture rate were studied. The results showed that, for strip magnets, when the magnetic end spacing was far enough, the axial placement was better than the transverse placement; for a low magnetic end spacing, the axial alternating arrangement was the best; for the rectangular magnets with the same magnetic flux and cross-sectional area, the square magnet with the aspect ratio of 1:1 had the best trapping effect on the particles. The results could provide theoretical guidance for the design of a multi-magnet magnetic separator.
- strip magnet,
- magnetic field gradient,
- open gradient magnetic separation,
- numerical simulation

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References(25)

References

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