摘要
基于颗粒动力学和气固两相流体动力学,建立流化床稠密气-固两相非等密度双组分颗粒运动碰撞解耦模型,采用硬球模拟方法研究颗粒间碰撞,大涡模拟方法研究气相湍流流动。基于牛顿第二定律建立单颗粒运动方程,应用牛顿第三定律确定颗粒相和气相相间相互作用的双向耦合。数值模拟二维鼓泡流化床内非等密度双组分颗粒气-固两相流动,计算结果表明颗粒弹性恢复系数影响分层流动特性。
On the basis of particulate dynamics and gas-solid two-phase hydrodynamics set up was a movement-collision decoupled model for the dense gas-solid two-phase and non-isodensity dual-component particulates in a fluidized bed. By using a hard sphere simulation method the collision among particulates was studied with a large eddy simulation method being employed to study gas- phase turbulent flows. A single-particulate movement equation was established based on Newton's second law. Newton's third law was applied to determine the two-way coupling resulting from the interaction of particulate phase and gas phase. A numerical simulation was performed for the gas-solid two-phase flow of the non-isodensity dual-component particulates in a two-dimensional bubbling fluidized bed. The calculation results indicate that the recovery factor of particulate elasticity may have an impact on laminar flow characteristics.
出处
《热能动力工程》
EI
CAS
CSCD
北大核心
2005年第6期615-618,共4页
Journal of Engineering for Thermal Energy and Power
基金
国家自然科学基金资助项目(50376013)
哈尔滨工业大学交叉基金资助项目(MD2002
31)
关键词
非等密度双组分颗粒
硬球模型
大涡模拟
流化床
分层流动
non-isodensity dual-component particulate,fluidized bed,hard sphere model,large eddy simulation,laminar flow
