• 作者： Wu, Tzu-Chiang; Lu, Hsin-Hsen; Yang, Yu-Minet al.
• 中文摘要： 本文探討含有正辛醇添加劑的靜置溴化鋰水溶液吸收水蒸氣時,由於表面張力梯度引發 Marangoni對流,造成促進界面熱、質傳的效應。氣/液界面和大部相的溫度差,以及水蒸氣的實際吸收量都顯示微量正辛醇會顯著地促進吸收。而且正辛醇濃度的影響有一極值區,超過極值區,濃度增加反使促進效力減退。文中並將此一影響程度量化為相當的人為攪拌效應。為了進一步探討由界面活性劑所引發的界面擾流和既存大部相擾流的交互作用,本文也進行同時有人為攪拌和正辛醇添加劑的吸收研究。實驗結果顯示,當人為攪拌效應較弱時,由界面活性添加劑引發的界面擾流在促進吸收上扮演主導的角色。而當人為攪拌效應漸強時,界面擾流的影響則逐漸式微。
• 英文摘要： The accelerating effects of surface-tension-driven Marangoni convection on interfacial heat and mass transfer were demonstrated by the absorption of steam by quiescent aqueous LiBr solution with n- octanol additive. Difference between surface and bulk temperatures and mass of steam absorbed consistently show that a small amount of n-octanol makes the enhancement factor considerably higher, and there is an optimum plateau. Beyond this plateau, further increase in n-octanol concentration makes enhancement factor lower. The effect caused by surfactant additive on quiescent liquid absorption can be quantified approximately to that caused by artificial agitation in liquid without additive. The effect of artificial liquid agitation on the absorption system in the presence of n-octanol was also studied to reveal the interaction between the induced interfacial turbulence and the inherent bulk turbulence. The experimental results show that interfacial turbulence caused by surfactant additive plays a dominant role in a system of less intense inherent bulk turbulence. On the other hand, highly intense bulk turbulence dominates over the interfacial turbulence in enhancing absorption .
• 中文關鍵字： Marangoni效應; 促進吸收; 界面活性劑添加物; 池式吸收
• 英文關鍵字： Marangoni Effect; Absorption Enhancement; Surfactant Additive; Pool Absorption