Abstract
In this study, the phenomena of multiple droplet impingement on a horizontal stainless steel hot surface are investigated and discussed. Visualization process is used to study the dynamic characteristics of droplet impingement. Image processing technique is used to capture and analyze the sequential images from a high-speed camera. The effects of the surface temperature and Weber number to the spreading ratio are investigated. The results of this study show that Weber number has a strong correlation with the droplet form for droplet impinging on the horizontal surface. On a lower Weber number, the form of multiple droplets are shaped better than higher Weber number. It is also found that, the pattern is formed more clearly at lower Weber numbers. Spreading and recoiling are shaped better at lower Weber numbers. The results also show that higher Weber numbers result in wider droplet spreading.
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