A THEORETICAL-MODEL FOR THE INFLUENCE OF GAS PROPERTIES AND PRESSURE ON SINGLE-BUBBLE FORMATION AT AN ORIFICE

A number of authors have on the basis of experiments determined that p ressure and gas density can have an influence on bubble formation size . Usually this influence is attributed to the gas momentum force, gene rated by gas flowing into the bubble during its formation. In this art icle the theoretical bubble formation model of Tan and Harris has been used (and slightly altered) in order to demonstrate (by comParing mod el calculations with literature experimental data) that gas properties and pressure can have a considerable influence on single-bubble forma tion even for conditions where the gas momentum force is still negligi ble. Finally, these results are also used to explain some observations that have been made in bubble columns.