A Criterion for the Occurrence of Bubble Fission and Its Modeling

Numerical Analysis of Unsteady Cavitating Flow around Balancing Drum of Multistage Pump

“…This mechanism is not captured well in this study. On the other hand, the break-up of the bubbles during their collapse is modelled using the Rayleigh-Taylor instability analysis [13][14]. Figure 14 shows the dynamics of bubbles for five initial bubble sizes along the trajectory of the first type (violet line from Fig.…”

“…The authors used this approach previously for a steady-state flow as described in [10][11][12]. The influence of the bubble breakup during the collapse was later taken into account in [13][14]. The effects of flow unsteadiness and bubble-bubble interaction were added to the model and described in [15].…”

“…The bubble-bubble interaction is taken into account by superposing the pressure change due to the pressure waves generated by the collapsing bubbles at different positions in the flow and propagated in the computational domain over the local pressure in the liquid (external to the bubble). The numerical model described in [10][11][12][13][14][15] is based on the two-way coupling. Both the CFD analysis and the analysis of the spherical bubble dynamics are performed using the in-house software.…”