Numerical evaluation of separation characteristics of open gradient magnetic separation using quadrupole magnetic field

Numerical study on the open gradient magnetic separation using the quadrupole magnetic field is presented in this paper. The characteristics of separating multiple kinds of magnetic particles with different magnetic susceptibility are numerically evaluated by the model to analyze the transient diffusion process developed in our previous study. We consider two methods for the separation of multiple kind particles. In the first method, the numerical results show that the two kinds of particles with different magnetic susceptibility can be selectively separated. The second method is one of the field flow fractionation which is called the magnetic chromatography. The calculated time evolutions of the particle concentration in the thin cylindrical channel show the flow velocity difference of the particle transport corresponding to the difference of the magnetic susceptibility. It is considered that the open gradient quadrupole magnetic field can be applied for the magnetic chromatography.