化工学报2011，Vol.62Issue(5)：1197-1204,8.DOI:10.3969/j.issn.0438-1157.2011.05.003
粗糙颗粒动理学及流化床内气固流动的数值模拟
Kinetic theory of rough spherical particles and numerical simulation of gas-solids flow in fluidiled bed
摘要
Abstract
Particle rotation, which has been less considered in particle kinetic model, plays an important role in gas-solids flow. Kinetic theory of rough spherical particles was proposed on the basis of kinetic theory of gases and kinetic theory of granular flow with the consideration of energy transport and dissipation by collision of particles. The models for solids phase stress, thermal flux and collisional energy dissipations of particles were presented by using Chapman-Enskog velocity distributions. Flow behavior of gas and particles was simulated by gas-solids two-phase flow model in a bubbling fluidized bed. Predicted velocity distribution and fluctuating velocity of particles were in agreement with experimental data measured by Yuu et al (2000) in a bubbling fluidized bed. The distribution of granular temperature,changing with concentration tended to be similar with the prediction by kinetic theory of granular flow. The effect of tangential restitution coefficient on fluctuating energy of particles was analyzed. Simulated results showed that at a low concentration of particles the fluctuating kinetic energy of particles increased with increasing tangential restitution coefficient.关键词
颗粒旋转/粗糙颗粒动理学/气固两相流/流化床Key words
particle rotation/ kinetic theory of rough spheres/ gas-solids two-phase flow/ fluidized bed分类
能源科技引用本文复制引用
陈巨辉,杜小丽,孙立岩,徐鹏飞,郝振华,陆慧林..粗糙颗粒动理学及流化床内气固流动的数值模拟[J].化工学报,2011,62(5):1197-1204,8.基金项目
国家自然科学基金项目(51076040). （51076040）
