Time Irreversibility from Time Series for Analyzing Oil-in-Water Flow Transition

Du Meng, Chen Xiao-yan, Liu Hong-ying, He Qing, Bai Rui-xiang, Liu Weixin, Li Zewei
2016 Mathematical Problems in Engineering  
We first experimentally collect conductance fluctuation signals of oil-in-water two-phase flow in a vertical pipe. Then we detect the flow pattern asymmetry character from the collected signals with multidimensional time irreversibility and multiscale time irreversibility index. Moreover, we propose a novel criterion, that is, AMSI (average of multiscale time irreversibility), to quantitatively investigate the oil-in-water two-phase flow pattern dynamics. The results show that AMSI is sensitive
more » ... to the flow pattern evolution that can be used to predict the flow pattern transition and bubble coalescence.
doi:10.1155/2016/2879524 fatcat:xlqop5ckmfflfmbkagq3m72zqa