气固两相流中颗粒轨道运动方程的一组分析解

摘要

在气固两相流场的单元体内建立了描述颗粒沿轨道运动的控制方程。针对不同Reynolds数范围内的气体一颗粒阻力系数表达式，导出了颗粒运动方程的一组分析解。在采用颗粒轨道或随机轨道模型时，它们可用于计算流场网格单元控制体或湍流随机涡团内颗粒运动的速度和轨迹。%The governing equations describing particle motions along trajectories is formulated in a domain cell for gas-solid flows. The analytical solutions of the equations are derived by using different expressions for the gas-particle drag coefficient which correspond to different regimes of particle Reynolds number. They can be utilized to calculate particle velocities and trajectories within a mesh cell or random eddy in particle trajectory/stochastic trajectory model.