流体中颗粒物在外力作用下运动速度模型的探讨

摘要

假设颗粒为球形,流体处于层流状态,通过数学手段推导出流体中颗粒物在外力作用下任意时刻的基本速度模型,并以此为基础进一步得出颗粒物在重力、离心力及静电力作用下的特定速度模型。虽然它们是在理想条件下得出的,但却有助于学生在课堂学习中更好的理解该部分内容,并加以应用。此外它们还可以为水及大气污染控制中各相关除尘器、沉淀池的设计参数提供重要依据,有助于提高其在实际工程设计中的应用价值。On the assumption that the particulates are spherical and the fluid is under laminar conditions, the basic ve- locity model is deduced for the fluid particulate under external force at any moment by mathematical means, and the specific velocity models are further inferred in the effects of gravity, centrifugal and static electricity. It has instructive meaning in helping students understand in class and apply the theory to practice, although it is obtained under ideal conditions. Furthermore, the kinematic velocity of fluid particulate is a major parameter in designing the related dust catcher and sedimentation basin in water and air pollution control, so the study of the velocity model of fluid particulate can redound the application value in actual engineering design.