Gas Sparging with No Mechanical Agitation

Leaving the vicinity of a sparger, the bubbles may break up or coalesce with others until an equilibrium size distribution is reached. A stable size is achieved when turbulent fluctuations and surface tension forces are in balance (Calderbank, 1959). 

Akita and Yoshida (1974) determined the bubble-size distribution in bubble columns using a photographic technique. The gas was sparged through perforated plates and single orifices, while various liquids were used. The following correlation was proposed for the Sauter-mean diameter  

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Gas Sparging with No Mechanical Agitation In a two-phase system where the continuous phase remains in place, the hold-up is related to superficial gas velocity Vs and bubble rise velocity V, (Sridhar and Potter, 1980) ... 

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