Abstract
An empirical approach was used to investigate the size of bubbles generated from perforated plates. Previous reports have shown that the size of bubbles formed at single circular holes is affected remarkably by chamber volume. The effect of chamber volume, however, becomes small with increasing number of holes and is not noticed at a number greater than about 15. The size of bubbles generated from perforated plates in the range where chamber volume has no effect shows different behavior at the critical ratio of pitch to hole diameter P/do of about 8. Empirical equations of the size of bubbles for each range are given.
