https://scholars.lib.ntu.edu.tw/handle/123456789/64204
標題: | 不同體積濃度液滴撞擊平板之現象研究 The phenomena research of different volume concentration droplet Impacting on the flat surface |
作者: | 陳俊霖 Chen, Chun-Lin |
關鍵字: | 液滴;撞擊;體積濃度;volume concentration;droplet;impact | 公開日期: | 2004 | 摘要: | 本實驗主要在觀察微小液滴撞擊平板穩定後的尺寸,藉由改變液滴的尺寸、速度以及利用水、不同體積濃度的水-乙醇和水-甘油溶液,以探討這些因素對其尺寸的影響。實驗結果發現,液滴的最大擴張半徑會隨著尺寸或速度的增加而變大,但是液滴和平板的接觸角卻是隨兩者增加而變小。另外,就不同的體積濃度而言,乙醇的含量越多時,液滴最大擴張半徑對速度的變率會隨尺寸變大而增加,但是對水-甘油溶液來說,甘油的含量越大則液滴的最大擴張半徑會接近撞擊前液滴半徑的1.5倍。 The purpose of the research is to observe the size of the minute drops which are after impacting on the flat surface and became steady. By changing the size and velocity of the drops, using water, and utilizing water-ethanol and water-glycerin with different volume concentration, we probed into those factors influencing the steady size. It turns out that along with the increase of the size or velocity, the max-dilated radius will rise; however, the contact angle of the droplet and flat surface will decrease due to the increase of both. Furthermore, in terms of the different volume concentration, when the content of ethanol gets more, the max-dilated radius of drops to the rate of the change of the velocity will increase since the size expands. Nevertheless, as for water-glycerin, the more the contest of glycerin is, the max-dilated radius will be more closer to 1.5 times size of the droplet before crashing. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/61539 | 其他識別: | zh-TW |
顯示於: | 機械工程學系 |
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ntu-93-R90522319-1.pdf | 23.53 kB | Adobe PDF | 檢視/開啟 |
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