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Rise Time Calculations of a Single Air Bubble under the Influence of Gravity in a Pool of Water

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Abstract:
Gas-liquid transfer operations are of considerable interest to the process industries. If the gas is brought into contact with the liquid in the form of bubbles, a better mass transfer is ensured. Usually, their size varies widely, from a few micrometers to a few millimetres. In this work, the influence of the initial bubble diameter, the liquid head and surface tension on the rise time calculations was exemplified for an air bubble in water, using the bubble expansion factor. Further, it was shown that smaller air bubbles are highly influenced by the surface tension. In contrast, for air bubbles in liquid head, if the initial size is larger than 0.1 mm the information needed for the rise time calculation is the liquid head only.

Keywords:initial bubble diameter, liquid head, rise time, single bubble, surface tension.

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