The transport of artificial microswimmers is an active research field due to their unique advantages in biological and medical applications, such as drug delivery, surgery, biosensing, minimally invasive medicine, particle separation and environmental treatment. Dynamic magnetic fields, for instance, rotating and oscillating magnetic fields, are often used as actuation strategies due to their noninvasive and biologically inert qualities. Producing oscillations in a magnetic field requires little sophisticated Helmholtz setups, and the field applies a torque in one direction and cannot actuate the motion of a Janus swimmer on a wall. Therefore, we numerically studied the movement of a Janus microswimmer near a wall by coupling an oscillating magnetic field and shear flow, and we found that this method significantly enhances the transport motion of the swimmer compared to shear flow or an oscillating magnetic field alone. Then, we clarified the mechanism of this transport motion, discussed the influences of the magnetic field and shear rate on the swimming speed and direction, and computed the critical relationship parameter for effect of the magnetic susceptibility of the coating and the oscillating magnetic field strength on the motion of the Janus particle. The knowledge obtained in this study is fundamental for understanding the interactions between shear flows and oscillating magnetic fields that affect the transport motion of a Janus microswimmer and provides a useful method for controlling the movement of a Janus microswimmer in shear flows.

人工微型游泳者的运输因其在生物和医学应用中的独特优势而成为一个活跃的研究领域，例如药物输送、手术、生物传感、微创医学、粒子分离和环境处理。动态磁场，例如旋转和振荡磁场，由于其非侵入性和生物惰性特性，经常被用作驱动策略。在磁场中产生振荡几乎不需要复杂的亥姆霍兹设置，并且该磁场会在一个方向上施加扭矩，并且无法驱动 Janus 游泳者在墙上的运动。因此，我们通过耦合振荡磁场和剪切流，对壁面附近的 Janus 微型游泳者的运动进行了数值研究，我们发现，与单独的剪切流或振荡磁场相比，这种方法显着增强了游泳者的传输运动。然后，阐明了这种传输运动的机理，讨论了磁场和剪切速率对游动速度和方向的影响，并计算了涂层磁化率和振荡磁场强度对涂层的影响的关键关系参数。 Janus 粒子的运动。本研究中获得的知识对于理解影响 Janus microswimmer 传输运动的剪切流和振荡磁场之间的相互作用至关重要，并提供了一种有用的方法来控制 Janus microswimmer 在剪切流中的运动。