An analytical film drainage model and breakup criterion for Taylor bubbles in slug flow in inclined round pipes

作者：Lizarraga Garcia E; Buongiorno J; Bucci M

来源：International Journal of Multiphase Flow, 2016, 84: 46-53.

DOI：10.1016/j.ijmultiphaseflow.2016.03.020

• Taylor bubble
• Slug flow
• Film drainage
• Film breakup criterion

The velocity of Taylor bubbles in inclined pipes is reduced if a lubricating liquid film between the bubble and the pipe wall is not present. An analytical model predicting the gravity-driven drainage of the lubricating film is presented in this article. The model is then used to establish a criterion for film breakup: if (t) over bar (bubble) = (t) over bar (bubble)/tau < 0.01 the thin film would not break up, where t(bubble) is the bubble's passage time, and tau is the characteristic film drainage time based on the fluid properties, pipe geometry, and critical film thickness. The model is validated experimentally with Taylor bubbles in inclined pipes (5 degrees to 90 degrees, the latter being vertical) with stagnant liquids (ethanol, methanol, and mixtures of deionized water and methanol).

• 出版日期2016-9
• 单位MIT