PROBLEM TO BE SOLVED: To efficiently set a powdery material flow characteristic when simulating a behavior such as powdery flow material to allow simulation of high reliability.;SOLUTION: An operation body 3 with one portion inserted into a layer of the deposited actual powder 2 is moved at a prescribed speed for an experiment to measure resistance force acting on the operation body from the powdery flow material under the moving. A surface shape of the powdery flow layer agitated by the operation body is measured after moving the operation body. In the other hand, an index of the powdery flow material characteristic, for example, a relation between a stress and a strain, a relation between the stress and a strain speed or the like, is estimated in a simulation technique, and simulation by numerical computation is carried out as to the operation the same as the experiment. A calculated value is collated with a measured value in the experiment, the numerical computations are carried out repeatedly while correcting the index of the powdery material flow characteristic, and the index is found to conform the experimental value substantially with the measured value. The behaviors of the various kinds of powdery, a mechanism using the powdery material, or the like is simulated using the index.;COPYRIGHT: (C)2005,JPO&NCIPI
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