Surface wave transition before breakup in a laminar liquid jet

摘要

Problems of liquid jet breakup are very fundamental in the fluid-dynamics and application fields of atomization. Instability theories of the surface wave were usually used to describe the breakup phenomena. In these theories, it was assumed that the surface wave was a regular sinusoidal wave. However, irregular surface waves were frequently observed even thought a liquid jet was laminar. In this paper, the surface wave structure on a vertically injected laminar liquid jet was experimentally investigated.