Abstract

Measurements of bubble velocities in freely bubbling beds have shown that the velocities of individual bubbles are influenced more markedly by the disposition of surrounding bubbles than by the size of the individual bubble itself. Bubbles present in high concentration rise at much greater velocities than isolated bubbles of the same volume. The apparent anomalies reported by Pyle and Harrison for the expansion of bubbling beds have been explained in terms of bubble velocities in excess of slug velocities.

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