トレーサ画像による流場計測の一手法(第2報)

概要

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Tracer pathline images of flow field give us a great deals of information about the flow field and several methods were developed to obtain the velocity vector from these pictures. In this paper, a new technique is proposed in order to obtain the velocity vector from the pathline image photograph of the flow field. The summary is as follows. 1) Streamline directions are obtained from the use of the imaginary vectors of which arguments have twice the values of gradient vectors of brightness of the photograph. 2) The velocities are also obtained from the use of the imaginary vectors and the original gradient vectors in the small area of interest. 3) The two kinds of the flow field, uniform flow and the flow around a circular cylinder, are analyzed by this method and the good results are obtained.
社団法人日本船舶海洋工学会の論文
1990-09-25