固体颗粒在液体中沉降速度的计算方法评述

EVALUATION ON CALCULATION METHODS OF SOLID PARTICLE SETTLING VELOCITY IN FLUID

固体颗粒在液体中的阻力系数和沉降速度的计算直接关系到现场有关工艺的设计。在固、液多相流计算中普遍采用漂移流动模型 ,固相在静止液体中的沉降速度是建立漂移流动模型的基础 ,因此 ,有必要深入了解固体颗粒在静止液体中的沉降动力学特性。综述了固体颗粒在静止液体中发生自由沉降和干涉沉降的阻力系数和沉降速度的计算相关式以及这些相关式的使用范围 ,并且考虑了颗粒形状和边界条件等因素对沉降速度的影响。

Calculation of subsidence rate and resistance coefficient of solid particles in fluid affect the relevant technological design on the spot directly. At present, drift flow model is usually adopted in the calculation of solid & fluid multiphase flow. Subsidence rate of solid phase in motionless fluid is the basis of drift flow model. So it is necessary to know the subsidence dynamic characteristics of solid particles in motionless fluid. The paper systematically describes correlation equations of subsidence rate and resistance coefficient for subsidence and interference subsidence rate of particles shape and boundary conditions. \;