Collision Characteristics and Investigation of a Droplet with a hemispherical film

• Main Authors: Ming-Huang, Tsai, 蔡銘煌
• Other Authors: 王興華
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/27732119248502373363

碩士 === 國立臺灣大學 === 機械工程學研究所 === 91 === In the study we investigated the phenomena of liquid-droplet impact the solid surface and displayed a certain appearance of the semicircle liquid film on the solid surface after impact. It was generated single steady liquid droplet by means of Ink-jet printing method. After liquid droplet detaches from generator and impacted through around air at room temperature and pressure. The kind of liquid droplet was distilled water and solid surface of impact was plastic. The method of study was we changed single liquid droplet size and impacted solid surface by different velocity. At the same time, we used a hemispherical liquid film was formed after liquid droplet impact solid surface, then fixed first liquid droplet size （static hemispherical droplet）and steady. To make changes in velocity and size of liquid droplet which impinging hemispherical liquid film (which size was greater, equal, and smaller). Therefore, first liquid droplet may regard as a hemispherical liquid film, and observes behavior of liquid droplet impacted hemispherical liquid film on the solid surface, and the outcome compared with model of single liquid droplet impacted on the solid surface. Primary parameters on experiment were size and impact velocity of liquid droplet. Finally, the sum and substance of experiment provided interaction of liquid droplet on the solid surface. Besides the result, in the experiment we found single liquid droplet impacted the solid surface, which produced a condition that had air bubbles were encompassed in hemispherical liquid film and made qualitative analysis.