1枚の流跡線画像における流れ方向自動判定法

概要

論文の詳細を見る
An automatic method for determination of flow directions in a one-digitalized path-line picture has been developed. Flow direction is locally determined by calculating the vorticity at an average position among four neighboring pathlines in four different ways. The four pathlines are taken on the Delaunay net, which is made on the positions of pathlines, in order to make the procedure of this method more universal than that so far in use. The final determination of flow directions is carried out based on the results in five different cells for improvement in accuracy. This method is applied to determine the flow directions in a separated flow around a circular cylinder using the velocity distributions obtained numerically by the MAC method. The average error is found to be only 0.8 % for 25 different velocity distributions. For the flow visualization picture in a square cavity, flow directions can be determined by the method without inducing error.
社団法人日本機械学会の論文
1990-04-25