摘要
本文首先建立了单个颗粒在流体中的自由沉降的微分方程,通过对颗粒阻力系数C_d与雷诺数Re的近似数学表达.采用龙格——库塔法,用计算机算出了不同条件下的沉降末速及达到沉降末速的时间,并形象地绘出了不同条件的v—t图.文中还验证了计算结果并具有足够的精度.
A differential equation is established in the paper concerning a single solid particle settling freely in an infinite expanse of fluid ,and approximate mathematical expressions are given of Cd the sphere drag coefficient of the particle in relation to Raynoids number Re. By employing Ronge-cotte method , the terminal settling velocities and the time when they are attained underdifferent conditions are calculated with a computer and the distinct curves of V vs T underdifferent conditions are drawn. Finally the calculation results are proved to be of high enough accuracy.
