本工作进一步研究了颗粒物性以及快速床直径对径向空隙率分布的影响.在三种不同大小的快速床中的实验结果表明,对于直径约为50μm的 A 类物料快速床,径向空隙率分布仅依赖于截面平均空隙率,而操作条件,颗粒密度和床层直径无直接影响。...本工作进一步研究了颗粒物性以及快速床直径对径向空隙率分布的影响.在三种不同大小的快速床中的实验结果表明,对于直径约为50μm的 A 类物料快速床,径向空隙率分布仅依赖于截面平均空隙率,而操作条件,颗粒密度和床层直径无直接影响。不同条件下的几乎全部径向空隙率分布实验结果均可用下面简单的经验关联式足够满意地给予描述:ε=(?)(0.191+φ^(2.5)+3φ^(11))展开更多
Two-phase flow is modeled by considering interactions between partocles and their surrounding fluid at three scales: micro-scale of particle size, meso-scale of cluster size, and macro-scale for the overall particulat...Two-phase flow is modeled by considering interactions between partocles and their surrounding fluid at three scales: micro-scale of particle size, meso-scale of cluster size, and macro-scale for the overall particulate system consisting of clusters carried by the surrounding dilute phase.A further constraint has been found necessary to describe the stability of the twophase flow: the total energy always seeks a minimum for the dynamics of such particulate systems.The modeling can be used to explain numerous phenomena in particle-fluid flow, such as flow regime transitions and the heterogeneity of the two-phase system. It not only reflects the physical nature of the particle-fluid flow, but also makes possible quantitative description for both gas-solid (G/S) and liquid-solid (L/S) systems.展开更多
文摘本工作进一步研究了颗粒物性以及快速床直径对径向空隙率分布的影响.在三种不同大小的快速床中的实验结果表明,对于直径约为50μm的 A 类物料快速床,径向空隙率分布仅依赖于截面平均空隙率,而操作条件,颗粒密度和床层直径无直接影响。不同条件下的几乎全部径向空隙率分布实验结果均可用下面简单的经验关联式足够满意地给予描述:ε=(?)(0.191+φ^(2.5)+3φ^(11))
文摘Two-phase flow is modeled by considering interactions between partocles and their surrounding fluid at three scales: micro-scale of particle size, meso-scale of cluster size, and macro-scale for the overall particulate system consisting of clusters carried by the surrounding dilute phase.A further constraint has been found necessary to describe the stability of the twophase flow: the total energy always seeks a minimum for the dynamics of such particulate systems.The modeling can be used to explain numerous phenomena in particle-fluid flow, such as flow regime transitions and the heterogeneity of the two-phase system. It not only reflects the physical nature of the particle-fluid flow, but also makes possible quantitative description for both gas-solid (G/S) and liquid-solid (L/S) systems.
