Numerical comparison and design of magnets arrays for particle separating, based on magnetophoresis

In this paper, based on magnetophoresis, the effects of magnets arrays changings on particle tracing are analyzed. The changing of magnets arrays are included the changings of magnets dimensions and also the changing of the space between them. Magnets arrays with different styles, have generated dissimilar magnetic field. Hence, in some cases the magnetic force is stronger. In these cases, the manipulation on particles are done in less time. The importance of this problem is related to increase the throughput of the microsystem.To conquer to this challenge analytical methods (mathematical piecewise method) in 2D platform are used. The path of particles in microchannel are predicted. Then, the changings in magnets arrays (gap-dimension) are inserted. Lastly, the comparison of distance, velocity, and time to find out the proper style are done.The results shown that for the specific surface area (volume in 3D platform), there is a particular magnets dimension with a particular spacing between them (gap-dimension). Which has performed a maximum effects on microparticles. The simulations for five surface area S1 = 40000 mu m(2), S2 = 62500 mu m(2), S3 = 90000 mu m(2), S4 = 122500 mu m(2), and S5 = 160000 mu m(2) are proceed. The results are describes as the couple of gap-dimension which the gap is the space between magnets and the dimension is the intersection of the magnets and the channel. The results of (gap-dimension) for specific surface area are listed respectively as: (500 mu m-107 mu m), (575 mu m-127 mu m), (650 mu m-146 mu m), (725 mu m-164 mu m), and (800 mu m - 183 mu m). The efficiency and throughput in this points are 100 percent for micro device. Because all of the particle are captured in the less time.Using the proper gap-dimension for the magnets arrays is led to maximize the efficiency and throughput of the microsystem.

Automated summary

In this paper, the effects of changes in magnet arrays on particle tracing based on magnetophoresis are analyzed. Different styles of magnet arrays generate different magnetic fields, resulting in stronger magnetic force and shorter particle manipulation time. The importance of this problem lies in increasing the throughput of microsystems. Analytical methods (mathematical piecewise method) on a 2D platform are used to predict the paths of particles in microchannels and insert changes in magnet arrays (gap-dimension). The efficiency and throughput are maximized by using the proper gap-dimension for the magnet arrays.