噴射液の自己不安定化機構の理論的研究

第3報：短距離分断過程の1次元計算

抄録

When an issued liquid jet breaks up into droplets at a short distance from the nozzle exit, its surface deforms significantly over its whole length. The one-dimensional model developed in the first report is refined so as to describe the deformation of the liquid jet tip and it is applied to analyze strong interactions between the capillary deformation of the jet and the nozzle exit, revealing the highly stochastic nature of the breakup phenomena. It is found that the Rayleigh type of disintegration of a liquid jet takes place only under the condition that the liquid Weber number is less than 1.5 and the liquid jet disintegrates relatively far apart from the nozzle exit. Otherwise, the regular disintegration of the jet can not occur without the help of aerodynamic action.