Figure 3. Comparison of the motion of cilia manipulated by the strike field and the rotating field in simulation and experiment, (A) Modeling of the RMS cilia array, (B) Actual RMS cilia array, (C) Motion of cilia when using the strike magnetic field, and (D) Motion of cilia when using the rotating magnetic field
When two different magnetic fields were applied, the experimental and FEM simulation results of the RMS cilia array were obtained (Figure. 3 and Movie S1 ). First, the fabricated RMS cilia array was set (Figure. 3B) and simplified for the FEM analysis (Figure. 3A). Similar to the actual RMS cilia array, the simplified model used nine cilium models that were magnetized at angles of -120, -100, -90, -50, 0, 60, 90, 100, and 120 degrees. It was confirmed that the motions of the RMS cilia array by the strike magnetic field showed a very similar tendency in both the simulation and the experiment (Figure. 3C). The RMS cilia array, due to the strike magnetic field, did not show an MCW. However, through the movement of
the stagnation zone of the fluid flow, it was confirmed that the fluid flow could advance forward intermittently. Similarly, the motions of the RMS cilia array due to the rotating magnetic field in the experiment and simulation were very similar (Figure. 3D). In addition, when the rotating magnetic field was applied, the RMS cilia showed continuous motion, and through the sequential movement of the stagnation zone of the fluid flow, it was confirmed that the MCW was distinctly implemented, and the fluid flow could advance sequentially forward.
2.3. Fluid Tests using Unilateral Cilia Array Channel