Dynamic Behavior of Nano-Size Dust Particles in a Magnetic Field Channel

作者：Huang Shan; Park Haewoo; Jo Youngmin^*

来源：Journal of Nanoscience and Nanotechnology, 2016, 16(5): 4328-4334.

DOI：10.1166/jnn.2016.11023

• Tiny Dust
• Particle Dynamics
• Magnetic Field
• Magnetic Particles
• Ferromagnetic Filter Net

Removal of very small dust from indoor public spaces, such as metro subway stations, is a challenge. A large proportion of subway dust, particularly that of submicron sizes, contains iron compounds. This study sought to understand the dynamic behavior of such fine iron dust in a magnetic field. The computer aided fluid dynamics(CFD) calculation revealed that the design and configuration of a rectangular flow channel with magnets determine the dynamic motion of particles. An attractive magnetic emitter arrangement produced higher magnetic flux density than a repulsive arrangement. Additional ferromagnetic wire mesh inserted into the duct channel could provide a more systematic magnetic field and collect more dust. The field gradient for 0.3 mm thick wire was more than twice that of 0.5 mm wire. The provision of a magnetic field could contribute a 20% increase in 100 nm particle collection and an increase of 5% in 10 nm.

• 出版日期2016-5