インクジェットにおける液滴合体に関する研究

概要

論文の詳細を見る
Liquid jet ejected from a small capillary into air breaks up to the droplets. In ink jet technology, some of the droplets are inductively charged as they break off from the main stream of the jet, and their trajectories are then modified by high voltage deflector. The droplets coalesce at a certain length separated from the liquid jet in manner determined by the physical properties of the liquid jet and the droplets. Measurements of the velocity of ink jet droplets were made using a microscope of an experimental apparatus in which the nozzle is about 10μm in diameter. It was shown that the distance for the coalescence of droplets from the liquid jet increases with the increase of density of liquid. The equation of motion for the droplet is analyzed numerically by assuming the air velocity around a droplet, and the computational trajectories are obtained. The results of numerical simulation for the coalescence agree well with the experimental results. It is seen that the droplet stream stability is affected by the dynamic surface tension of the jet.
一般社団法人日本機械学会の論文
1998-03-25