Combined Technique of PIV and CFD for Flow Field Understanding

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  • A107 PIVとCFDを組み合わせた流れ場の推定法
  • PIV ト CFD オ クミアワセタ ナガレバ ノ スイテイホウ

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Abstract

CFD and field measurement have been used widely to understand flow field. Although CFD can estimate full view of flow field easily, it contains inevitably numerical errors. Meanwhile, field measurement usually requires much labor and contains experimental errors, too. PIV can measure flow velocities at many points simultaneously, but it is still difficult to measure whole points for a large field.<BR>In this work, we propose a new technique to understand the whole flow field by combining PIV and CFD. In this technique, velocities at data absence points are calculated by CFD using locally obtained PIV data as a boundary condtion. And the PIV data are corrected simultaneously to reduce measurement errors using CFD results and fundamental equations of fluid dynamics. To examine this technique we performed some simulations using artificial data. And the two-dimensional flow in the staggered screens was retrieved using our combined technique. The results agreed well with visualized flow patterns. It can be possible to reproduce whole flow field adequately by using our new technique. But it is still necessary to examine the perfomance of our method in full detail.

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