流化床非平衡态热力学分析模型

用非平衡态热力学的分析方法分析了流化床系统的熵、熵产生、熵流，讨论了流化床系统的热力学分支和耗散结构分支，论证了流化床系统的能量最小原则，使热力学第二定律同流化床理论研究有机地相结合。建立了鼓泡流化床的数学模型和过渡态判据。热力学第二定律的引入，使热力学和流体动力学与流化床理论研究、耗散结构分支与系统运动形式的多样性、系统总体稳定与局部非稳定在理论描述上相统一。

Nonequilibrium thermodynamic model of fluidized beds

In order to establish mathematical models of fluidized beds by combining thermodynamics and gas solid two phase flow theory, the entropy, entropy production and entropy flow of fluidized beds are discussed. Gas solid beds behave as the thermodynamic feature in lower velocity and the dissipative structural characteristic in the higher. Based on the above, the minimum energy principle is introduced, and a quantitative criterion for predicting whether a fluidized bed is bubbling and a mathematical model for bubbling fluidized beds are presented, which can be used to describe bubble merging, the size of bubble and its trail, emulsion void and the velocities of bubble and particle cluster, etc.