MENISCUS DYNAMICS IN MATERIAL PROCESSING

摘要

Wetting behavior of liquid and dynamics of the meniscus are important in many meniscus-controlled material processes such as Edge-defined Film-fed Growth (EFG), fiber pulling growth, microano tube growth, etc. Understanding dynamic responses of meniscus to perturbations is essential to the improvement of the quality of products from these processes. In this paper, symmetric meniscus structure as well as asymmetric structure and the break-up of the steady-state meniscus are studied experimentally using the techniques of pulling from shaper (TPS). The break-up conditions for the steady-state meniscus are obtained. A theoretical model is also proposed to study the dynamic response of the meniscus shape with a given ribbon thickness to the change in pulling rate and meniscus height. This model is analyzed for symmetric meniscus structure and its transition to an asymmetric system.