Numerical Study of Gas-solid Flow Behavior of Nano Particles in Spouted Beds with an Agglomerate-based Approach
Based on the kinetic theory, the constitutive equations of nano particles flow were developed. The energy transfer and dissipation by the instantaneous collisions between the agglomerates of nano particles and gas phase or between agglomerates-agglomerates are considered. The model of particle viscosity and pressure of particle agglomerations were proposed, and the size of agglomerations was estimated by model proposed by Xu&Zhu (2005) from energy balance acting on an agglomerations. Flow behavior of nano-size particle agglomerations in spouted bed was numerically studied by this new model. The results of simulation showed that the flow field of cohesive particles in the spouted bed is different from the general flow field in spouted bed. There is no fountain at the surface of the bed. The complex wall of the invert cone will influence on flow behavior in the spouted bed. The chaotic behavior of solids flow in the spouted bed is analyzed by using the Shannon entropy theory. The results show that The Shannon entropy is quite difference in the different regimes in the spouted beds.
Spouted bed Agglomerates of nano particles Simulation
Zheng Jianxiang Lv Tai Lu Huilin
School of Energy Resources and Mechanical Engineering, Northeast Dianli University, Jilin Province, School of Energy Science and Engineering, Harbin Institute of Technology, Harbin Heilongjiang Provin
国际会议
沈阳
英文
439-442
2009-08-27（万方平台首次上网日期，不代表论文的发表时间）