An algorithm in piv measurement of wind-sand two-phase flow
风沙两相流PIV测量算法研究

On the basis of characteristics of wind-sand two-phase flow CCD images, an auto generated Digital Mask algorithm based on K-mean value algorithm of pattern recognition's dynamic clustering method is proposed to solve the wind-sand two-phase flow. This algorithm simplifies the manual setting operation of parameters in the process of the traditional generation of Digital Mask, reduces the man-made error, and provides a safe and fast method to process two-phase PIV images in batch. Finally,this algorithm is applied to real measurements of wind-sand two-phase flow.After computation, the flow fields of the phase of the wind, the phase of the sand and the two-phase of the wind-sand of different flow types are obtained.