Abstract
Recently, optimization using computational fluid dynamics (CFD) simulators is gaining attention in various fields. However, solution space is unstable because of the loss of trailing digits or calculation error. Thus, even if the solutions are close to each other, costs do not decrease or increase constantly. Specifically, the costs are about the same, but sometimes the quality of the experimental results differs dramatically. We therefore proposed an algorithm which can realize high calculation quality in actual experiments taking into account the effects of the loss of trailing digits or calculation errors, and applied it successfully to the die casting process.
