単一落下液滴と静止油面の衝突における液滴の変形 : 液滴の表面張力および動粘度の影響(流体工学, 流体機械)

概要

論文の詳細を見る
Deformation of a liquid drop fallen on the stationary silicone-oil surface was examined in detail. Special attention was directed to the influence of the liquid-drop and silicone-oil properties on the deformation of the drop after the impact with the oil surface. Water solutions of ethanol or glycerin with various concentrations were used for liquid drop to control its surface tension σ_L and kinematic viscosity ν_L. Various kinds of silicone oils were tested that cover a wide range of kinematic viscosity ν_T, 1∿(10)^5(mm)^2/s, under nearly a constant surface tension. The drop diameter at its maximum spread, d_M. is influenced by not only σ_L and ν_L of the drop itself but also ν_T of the silicone oil. The influence of σ_L on d_M is pronounced under the condition of ν_T<(10)^2(mm)^2/s, whereas ν_L has a significant influence on d_M over the whole range of ν_T. With highly viscous silicone oil of ν_T>(10)^4(mm)^2/s, d_M/d_L (d_L : initial diameter of drop) for all σ_L and ν_L can be well correlated by Reynolds number and Ohnesorge number.
社団法人日本機械学会の論文
2001-12-25