In the present study, a computational methodology based on computational fluid dynamics (CFD) is developed to investigate free surface film flow and its subsequent disintegration on a rotary disk atomizer. The present study provides an insight into efficiently modeling both liquid film formation and its subsequent disintegration. The presented computational methodology can easily be reproduced and can act as a benchmark for the modeling of liquid film formation as well as the disintegration phenomenon. The influence of disk speed, liquid flow and feed arrangement on the rotating disk are investigated. The film thickness profile on the disk resembles the formation of spiral waves at 500 RPM and an irregular breakup of the spiral waves for a disk speed of 1000 RPM. At higher speeds, a smooth and thin liquid film is observed on the disk. Offset feeding of the liquid on the disk alters the wave formation and breakup of the spiral waves. It is found that ligaments are formed at the lip of the disk owing to Rayleigh–Taylor instability, whereas liquid sheet breakup is due to combined rim and wave disintegration for the parameters investigated in this study.

在本研究中，开发了一种基于计算流体动力学 (CFD) 的计算方法来研究自由表面薄膜流动及其随后在转盘雾化器上的分解。本研究提供了对有效模拟液膜形成及其随后崩解的见解。所提出的计算方法可以很容易地重现，并且可以作为液膜形成和崩解现象建模的基准。研究了圆盘速度、液体流量和进料布置对旋转圆盘的影响。磁盘上的薄膜厚度分布类似于 500 RPM 时螺旋波的形成，以及磁盘速度为 1000 RPM 时螺旋波的不规则破裂。在更高的速度下，可以在磁盘上观察到一层光滑而薄的液膜。盘上液体的偏移供给改变了螺旋波的波形成和破裂。据发现，由于瑞利-泰勒不稳定性，韧带在圆盘边缘形成，而液体片破裂是由于本研究中研究的参数的边缘和波浪崩解的组合。