Characterizing slug to churn flow transition by using multivariate pseudo Wigner distribution and multivariate multiscale entropy
Characterizing slug to churn flow transition by using multivariate pseudo Wigner distribution and multivariate multiscale entropy
复制标题
使用多元伪维格纳分布和多元多尺度熵表征段塞流到搅动流的转变
DOI：
10.1016/j.cej.2016.01.039
复制
发表时间：
2016-05-01
影响因子：
15.1
通讯作者：
Jin, Ning-De
中科院分区：
文献类型：
--
作者：
Gao, Zhong-Ke;Yang, Yu-Xuan;Jin, Ning-De
揭示不同流动条件下弹状流的过渡特性是一个具有挑战性的重要问题。基于多通道实测数据，通过计算多变量伪维格纳分布（MPWD），提取时频特征，研究了弹状流和搅拌流的瞬态特性。然后，我们计算了多变量多尺度样本熵（MMSE）为不同的流动条件，并发现MMSE允许我们揭示的动态流动行为的过渡段塞流到搅拌流。研究结果表明，MPWD和MMSE相结合，可以揭示弹状流和搅动流形成和转变的瞬态和多尺度流动行为。(C)© 2016 Elsevier B.V.版权所有。
Uncovering transitional behavior of slug flow under different flow conditions constitutes a challenging problem of significant importance. Based on the experimental multi-channel measurements, we first calculate multivariate pseudo Wigner distribution (MPWD) and extract time-frequency features to probe the transient behavior of slug flow and churn flow. Then we calculate the multivariate multiscale sample entropy (MMSE) for different flow conditions and find that the MMSE allows us to uncover the dynamic flow behavior governing the transition from slug flow to churn flow. Our results indicate combining the MPWD and MMSE enables to reveal the transient and multiscale flow behavior underlying the formation and transition of slug flow and churn flow. (C) 2016 Elsevier B.V. All rights reserved.