不同溶液之高速液滴與平板之碰撞

本研究以實驗之方式來探討液滴撞擊乾平板之物理現象，並建立了一套可以帶動液滴，使其在短距離內就可以加速液滴之設備。在單顆液滴撞擊平板方面，使用純水、甘油水、Heptane、Nonane四種溶液來當其碰撞液體，控制參數為撞擊速度、表面粗糙度。實驗之重點在於由上方清楚的拍攝其液滴撞擊平板的過程，因前人鮮少有在液滴與乾版撞擊時，由上方拍攝與記錄，並探討其液體會發生之各種物理現象。此外由於使用之高速攝影機能將其撞擊之情形紀錄下來，才得以對每種液體之飛濺直徑與最大擴張直徑作分析與探討。並在指狀數目與表面粗糙度之關係與前人做探討與分析。

關鍵字

液滴碰撞；高速液滴；平板；飛濺直徑；韋伯數

並列摘要

The study discusses the physical atmosphere of the droplet impact the dry surface with the experiment and designs the appliance to speed droplet in a short distance. With regard to a droplet hitting dry surface, the liquid used to hit are water, Glycerol, Heptane, and Nonane. The control parameter is hitting speed and surface roughness. The experiment emphasizes the liquid hitting surface process by the picture taking from the top because there are few studies used by this way, and it also discusses the different physical atmosphere. In addition, on account of the hitting process capture of the high speed video camera, we can analyze and discuss the splash diameter and maximum spread diameter of different liquid. There also discusses the relation with the number of fingers and surface roughness and compare with the former workers.

並列關鍵字

droplet collision, ； high speed droplet ； dry surface ； splash diameter ； Weber number

參考文獻

[48] 周秉忠,“不同表面張力水溶液之高速雙液滴碰撞＂國立台灣大學機械工程研究所碩士論文,2008。

[1] Aziz, S. D. and Chandra, S., “Impact, Recoil and Splashing of Molten Metal Droplets,” Int. J. Heat Mass Transfer, Vol. 43, pp. 2841-2857,2000

[2] Bussmann, M. , Chandra, S. and Mostaghimi, J., “Modeling the Splash of a Droplet Impacting a Solid Surface,” Phys. Fluids, Vol. 12(12), pp. 3121-3132, 2000.

[3] Chandra, S. and Avedisian, C. T., “On the collision of a droplet with a surface,”Proc.R.Soc.London,Ser.A. Vo1.432,pp.13-41,1991

[4] Chandra, S. and Avedisian, C. T., “Observations of Droplet Impingement on a Ceramic Porous Surface,” Int. J. Heat Mass Transfer, Vol. 35, No. 10, pp. 2377-2388, 1992.

國際替代計量

不同溶液之高速液滴與平板之碰撞

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