中文摘要：

氧气是顺磁性气体，氮气是抗磁性气体，其在梯度磁场中具有不同的磁特性。氮气与氧气在受到梯度磁场影响时，其流动及扩散情况会呈现不同的行为特性。本文建立多通道层叠磁体阵列结构试验系统，并根据高纯氮气在多通道层叠磁体阵列结构气流通道中流动时气体中氧含量的变化，进行空气中氧气以及高纯氮气在具有梯度磁场作用时的流动及扩散情况的研究。高纯氮气在多通道层叠磁体阵列结构气流通道流动过程中，在气流通道两侧出口边界处，气流通道外空气中氧气扩散、高纯氮气流动传质以及梯度磁场对氧气的吸附作用存在动态平衡，而且气流通道两侧的梯度磁场可以有效增强气流通道外空气中氧气向气流通道内的扩散作用。

英文摘要：

Oxygen gas is paramagnetic and Nitrogen gas is diamagnetic, while they have different magnetic properties in gradient magnetic field. The flow and diffusion behavior of Oxygen gas and Nitrogen gas in the gradient magnetic field are different. The experimental system of multi-channel cascading magnets array is built in the paper. The flow and diffusion behavior of Oxygen gas and Nitrogen gas in the gradient magnetic field are studied according to the changes of oxygen concentration in high-purity nitrogen gas flowing through the experimental system. The dynamic equilibrium including the diffusion of oxygen in the outer air and the mass flow of high-purity nitrogen gas and the influence on oxygen by gradient magnetic field exists at both sides of gas flow channels. The gradient magnetic field can effectively enhance the oxygen gas in the atmosphere air to diffuse into gas flow channel.