摘要
对旋流两相流动,用考虑壁面粗糙度的双流体颗粒-壁面碰撞模型,结合二阶矩两相湍流模型和不同颗粒相边界条件,进行了数值模拟。结果表明,由于考虑了各方向雷诺应力之间的相互转化,雷诺应力从平均运动中得到能量,以及壁面对颗粒运动的衰减作用等因素,该颗粒壁面碰撞模型给出的模拟结果与实验符合较好,而广泛应用的零梯度颗粒壁面边界条件给出的模拟结果最差。
Swirling gas-particle flows were simulated using a two-fluid particle-wall collision model accounting for the wall roughness and different particle wall boundary conditions. Owing to that the model accounts for the redistribution of particle Reynolds stresses in different directions at the wall, the absorption of turbulent kinetic energy from the kinetic energy of mean motion at the wall and the attenuation of particle motion by the wall, the proposed model gives prediction results in good agreement with the experimental results, while the widely used zero-gradient boundary conditions of particle phase give worst results.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2004年第1期81-84,共4页
Journal of Engineering Thermophysics
基金
国家重点基础研究专项经费资助项目子课题(No.G1999-0222-08)
关键词
颗粒-壁面碰撞
壁面边界条件
旋流两相流动
particle-wall collision
wall boundary conditions
swirling two-phase flows
