• 作者： Lee, S. J.; Chang, C. Y.; Chiu, C. Y.; Huang, W. H.; Shih, S. M.
• 中文摘要： 在溼沈降、以及諸如溼式洗滌器等空氣汙染控制設備中，液滴與氣體間的質量傳送為去除氣狀汙染物的重要機制。液滴振盪過程的幾何行為對液滴與氣體之間的質量傳送具有重要影響。在建立應用於大氣品質或空氣汙染控制設備程序模擬的理想質量傳送模式時，對液滴振盪幾何行為的了解是必須的。本研究先假設液滴垂直軸（即中心對稱軸）長度在持續受激發的垂直型振盪過程中呈現簡諧運動型式的變化，再依液滴體積守恆，衍導得到簡諧運動模式的軸比（垂直軸對水平軸）方程式。經由與Beard(1984)勢流模式的軸比結果進行比對，發現二者極為吻合。由此肯定振盪過程液滴垂直軸的運動具有簡諧運動的特性。此一發現對描述液滴振盪幾何行為提供清楚、簡易的觀念與公式。
• 英文摘要： The shape motion of oscillating falling liquid droplets plays a significant role to affect the mass transfer between gas and liquid droplets, which is an important mechanism for the transport of gas pollutant species in the atmospheric environment such as wet deposition and the air pollution control devices (APCDs) such as wet scrubbers. A proper description of the shape motion of droplets is thus essential to the adequate mass transfer model for use in air quality modeling of the atmospheric environment and process modeling of the APCDs. In this study, a simple harmonic motion is applied to describe the variation of the vertical axis of the droplet with successively excited oscillation. In the theoretical derivation, the volume of liquid droplet obeys the conservation law. A closed form solution is obtained. The results of the axis ratio (.alpha./sub.upsilon./) of the vertical to horizontal axis of the droplet agree well with the numerical result of Beard (1984) employing a potential flow model with gravity. This thus supports the simple harmonic motion nature of oscillating falling liquid droplets with successive excitation. The solution of the present analysis is simple and easier than the numerical solution for providing a good model for liquid-phase mass transfer coefficient of liquid droplet.
• 中文關鍵字： 簡諧運動; 振盪液滴; 質量傳遞; 吸收; 幾何模型
• 英文關鍵字： Simple Harmonic Motion; Oscillating Liquid Drop; Mass Transfer; Absorption; Geometric Model