Abstract
The jet issuing from two parallel pipes is encountered in various cases in industry. This jet flow was visualized by the LIF method. Moreover, the flow image obtained from flow visualization was decomposed into multi-scale, by using the wavelet multi-resolution analysis. As a result, it has been found from the result of flow visualization that the spread of the jet becomes large with the increase of the pulsating frequency. And in cases of the frequency from 3 to 4 Hz, it is recognized clearly that the clusters spout out from pipes. Furthermore, it has been also clarified that a large scale structure breaks into a small one, by adding the pulsation and with the increase of the pulsating frequency.
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