A novel particle tracking algorithm using polar coordinate system similarity  

作　　者：Xiaodong Ruan Wenfeng Zhao 

机构地区：[1]The State Key Laboratory of Fluid Power Transmission and Control,Zhejiang University, Hangzhou 310027, China

出　　处：《Acta Mechanica Sinica》2005年第5期430-435,共6页力学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(50206019)

摘　　要：A new algorithm using polar coordinate system similarity （PCSS） for tracking particle in particle tracking velocimetry （PTV） is proposed. The essence of the algorithm is to consider simultaneously the changes of the distance and angle of surrounding particles relative to the object particle. Monte Carlo simulations of a solid body rotational flow and a parallel shearing flow are used to investigate flows measurable by PCSS and the influences of experimental parameters on the implementation of the new algorithm. The results indicate that the PCSS algorithm can be applied to flows subjected to strong rotation and is not sensitive to experimental parameters in comparison with the conventional binary image cross-correlation （BICC） algorithm. Finally, PCSS is applied to images of a real experiment.A new algorithm using polar coordinate system similarity （PCSS） for tracking particle in particle tracking velocimetry （PTV） is proposed. The essence of the algorithm is to consider simultaneously the changes of the distance and angle of surrounding particles relative to the object particle. Monte Carlo simulations of a solid body rotational flow and a parallel shearing flow are used to investigate flows measurable by PCSS and the influences of experimental parameters on the implementation of the new algorithm. The results indicate that the PCSS algorithm can be applied to flows subjected to strong rotation and is not sensitive to experimental parameters in comparison with the conventional binary image cross-correlation （BICC） algorithm. Finally, PCSS is applied to images of a real experiment.

关 键 词：PIV . PTV . Polar coordinate system similarity .Binary image cross-correlation. 

分 类 号：O572.2[理学—粒子物理与原子核物理]