We carried out transient analysis of stirred fluid flow with rotating gear using the particle method (MPS method). The particle method is widely used as an effective technique or free surface flow and also easy to treat the moving boundary. In this research, we focused on the fluid resistance of gear and verified the correspondence with the experiments with two types of gear and two types of rotational rate. As a result, we found that the simulation value of stirring torque was consistent with experimental value in case of low rotational rate.

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