CASTING SIMULATION UNIT, CASTING SIMULATION METHOD, CASTING SIMULATION PROGRAM, AND COMPUTER READABLE RECORDING MEDIUM WITH STORED CASTING SIMULATION PROGRAM

摘要

PROBLEM TO BE SOLVED: To accurately simulate a shifting position in a minute closed range when molten metal flowing in a casting is simulated. SOLUTION: In the case that the detected closed region is not larger than a prescribed volume or not higher than a prescribed pressure, by simulating (S1-S3) the molten metal flowing and detecting (S4) the closed region formed by the molten metal flowing, the closed region is replaced with a virtual grain having zero of the volume and zero of the mass (S5) and thereafter, the virtual grain is shifted along the molten metal flowing (S6). In this way, even in the case of becoming impossible to stably succeed a flowing body calculation using a back pressure calculated result in the conventional simulation because the volume in the closed region becomes too small or the pressure in the closed region becomes too high, the molten metal flowing can accurately be simulated to the last by making use of the virtual grain of this closed region, even in the case of applying to the actual casting having complicated shape.