颗粒流体系统的流域特性及其混沌行为

应用混沌动力学方法研究了颗粒流体系统的流域特性以及流域之间的过渡，从奇异吸引子图及波动频率、平均绝对偏差（ＡＡＤ）、Ｋｏｌｍｏｇｏｒｏｖ熵（Ｋ）和相关维数（Ｄ）等动力学参数的角度出发，论证了系统随气速增大依次出现颗粒控制的固定床（Ｐａｒｔｉｃｌｅ－Ｄｏｍｉｎａｔｉｎｇ，ＰＤ）、颗粒流体协调的流化床（Ｐａｒｔｉｃｌｅ－Ｆｌｕｉｄ－Ｃｏｍｐｒｏｍｉｓｉｎｇ，ＰＦＣ）和流体控制的稀相输送（Ｆｌｕｉｄ－Ｄｏｍｉｎａｔｉｎｇ，ＦＤ）等不同流域，讨论了流域之间的过渡。

REGDIME CHARACTERIZATION AND CHAOTIC BEHAVIORS IN PARTICLE-FLUID SYSTEMS

This paper is devoted to characterizing regime transitions in particle-fluid systems by applying chaotic kinetics. Based on strange attractors and other dynamic parameters such as average cycle frequency, average absolute deviation (AAD),Kolmogorov entropy(K)and correlation dimension(D), it is demonstrated that three different regimes of particle-dominating (PD) fixed bed, particle-fluid-compromising(PFC)fluidized bed and fluid-dominating(FD)dilute transport prevail in turn in the system with increasing fluid velocity. Regime transitions between these different regimes can be characterized by inflective changes of the involved parameters.