A technique of analyzing fluid behavior of a resin material including deformation of particles. A fluidity analysis method is characterized by establishing a calculating method in which the results of experiments on the deformation of and load on the particles are received as inputted values, the flow process of a resin material is predicted by a fluid analysis technique, and the flow and particle deformation of the resin material are predicted. Specifically, at a time step, the deformation of particles is determined from the interval between electrodes determined by fluid analysis, the load determined by subtracting the load corresponding to the deformation of the particles from the load to move the electrodes is used as the load to move the electrode at the next time step. With this, the process of flowing of a resin material while particles are deforming is predicted by fluid analysis.
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