費用関数を用いた最適化手法によるPIVとCFDの融合

概要

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In fluid engineering, it is important to understand velocity and temperature profiles of target fields. Usually CFD or OFD techniques are used for understanding flow fields except for simple flow field which can be solved analytically, and they have basically been used independently even if they are sometimes compared mutually. But each technique contains merits and demerits. For example, CFD has inevitably errors accompanied by numerical nodeling and discretization, and on the other hand OFD includes lack of data and measurement error. In this research, we proposed a more rational technique that combines CFD and OFD techniques and overcomes these demerits by optimization technology using cost function. This cost function contains square of difference between observed and solution values, residual of continuity equation and N-S equation. We introduced some coefficients to determine the relative importance of these three terms, and conducted some sensitivity analyses. Then we obtained good results that agree with our intention and could verify the varidity of our cost function method.
社団法人日本機械学会の論文
2000-02-25