Читать книгу The Rheology Handbook - Thomas Mezger - Страница 27

With dp = 10 µm = 10-5 m, η = 1mPas = 10-3 Pas, and ρp = 2.5 g/cm3 = 2500 kg/m3 (e. g. quartz silica sand), and ρfl = 1 g/cm3 = 1000 kg/m3 (pure water); results: v = approx. 8.2 ⋅ 10-5 m/s

Such a particle is sinking a maximum path of approx. 30 cm in 1 h (or approx. 7 m per day).

With h = 1 µm results: γ ̇ = v/h = approx. 80 s-1