抄録
Unsteady motion of a finitely stretched liquid column suspended in another quiescent fluid is studied numerically for the flow where both inertia and viscosity are dominant. A Front-Tracking / Finite Difference method is used to simulate the interfacial motion of the liquid column. The end of the column retracts and forms into a bulb due to non-uniform capillary force. Three different modes of the motion are identified: (I) the bulb pinches off and the rest of the column also breaks up into daughter drops, (II) the bulb moves toward the midsection of the column and the column becomes a spherical drop, and (III) the bulb pinches off due to end-pinching. These modes can be classified by the Ohnesorge number and the viscosity ratio.
