An improved theoretical model for eddy‐induced bubble breakup in turbulent flows

Abstract This work aims on establishing an improved model for bubble breakup in turbulent flows. To achieve this goal, the impact of bubble shape on the critical size for distinguishing large and small eddies, cross‐sectional area of eddy‐bubble collision tube, energy increment breakage criterion, and force breakage criterion is deeply studied, and accurate formulas quantifying these effects are incorporated into the developed model. Moreover, a dimensionless number is proposed to overcome the limitation of the collision cube mechanism model which neglects the influence of bubble oscillation in the radial direction of the tube. The results indicate that the developed model exhibits high prediction accuracy with a mean absolute relative error ( MARE ) of 18.88% for the breakage frequency, and the predicted bubble size distribution aligns closely with experimental trends.