Other Phenomena Influenced by Marangoni Flow

When distillation or gas absorption is carried out in a packed column, it is important for maintaining a large area for transfo- that the liquid flows as a film covraing the entire solid surface and that it not break up into rivulets. Let us consider binary distillation for a system where the more volatile component has 

FIGURE 6.10 Falling film subject to disturbances leading to the formation of rivulets. From Johnson and Berg (1983). 

Marangoni flow enhances the rate of spreading up the surface of the glass until enough liquid collects to form tears. 

Cazabat et al. (1990) investigated contact lines where Marangoni effect is induced by a temperature gradient. An additional feature is seen in the form of a periodic structure along the contact hne. 

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