There are a large number of parameters influencing the fluid behavior. We used COMSOL to simulate the reciprocating motion of the magnet adsorbing the MF in the housing for one cycle, and observed the flow of the MF in the process of motion. Due to the symmetrical structure of the MFSA, simultaneously considering the computational cost, we adopted a two-dimensional configuration that contained only a small part of the MFAS for simulation calculations. The multi-physics coupling was employed in the fluid simulation and the dynamic mesh served as a bridge connecting the magnet motion and the fluid motion. The input parameters were the same as those used in the experimental work and are given in Table . According to Equation (2), it is worth noting that the decrease of 𝑟 leads to the increase of 𝛾. In order to exclude the influence of the surface textures' thickness on the 𝛾, we make ℎ 1 equal to ℎ 2 in the simulation, as shown in Fig. and.