Abstract
A bubble column with concentrically arranged orifices has been numerically simulated in this article. Bubble growth, departure, and rise have been studied stage-wise to understand the effect of the neighboring orifice and bubbles on these phenomena. A dissimilar inflow condition through the orifices has also been applied in simulations to make out the effect of asymmetric interfacial interaction on the overall performance of the bubble column. Furthermore, the effect of reduced gravity on the bubble departure volume, frequency, and interaction has also been analyzed. A new scheme of the intermittent inflow has been proposed to reduce the bubble size and improve the bubble column performance. An effort has also been made to analytically predict the minimum bubble size from the basic understanding of the departure mechanism for both continuous and intermittent flow conditions. For further improvement of the bubble column performance, the effect of inflow velocity and on time for intermittent flow has been studied, and the rationale of making the right choice of those parameters has been discussed.
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