论文部分内容阅读
斯托克(Stokes)定律系表示混悬液在理想体系中的微粒沉降速度,是一个重要的公式;为提高混悬剂的稳定性,在平时实际应用中有时也用于计算沉降速度,其公式为V=2r~2(d_1-d_2)g/9η,其中V为混悬微粒的沉降速度,d_1为混悬微粒的密度,d_2为分散媒的密度,η为分散媒的粘度,r为混悬微粒的半径,g为重力加速度。笔者在阅以下三本书时,发现在书中Stokes定律公式、定义相同的情况下,却在分散媒粘度(η)和重力加速度(g)的“单位”上出现了不同。
Stokes law represents the particle sedimentation speed of the suspension in the ideal system is an important formula; in order to improve the stability of the suspension, in practical applications sometimes also used to calculate the settling velocity, the The formula is V = 2r ~ 2 (d_1-d_2) g / 9η, where V is the settling velocity of the suspended particles, d_1 is the density of the suspended particles, d_2 is the density of the dispersant, η is the viscosity of the dispersant, r is The radius of the suspended particles, g is the gravitational acceleration. When I read the following three books, I found that there are differences in the “unit” of dispersion viscosity (η) and gravitational acceleration (g) in the book of Stokes law formula, the same definition.