WAVE COALESCENCE AND ENTRAINMENT IN VERTICAL ANNULAR TWO-PHASE FLOW

A rigorous model for wave coalescence has been derived. The wave coalescence processhas also been modelled by a Monte-Carlo technique. The results of the theories are in generalin good agreement with the available experimental data. It had been noted that coalescence oftwo waves was accompanied by a large burst of entrainment. The above coalescence theory hasbeen used to calculate that component of entrainment that is due to coalescence. Comparisonof this and experimental data shows that the entrainment due to coalescence can be a significantportion of the total entrainment