Appendix C. Numerical error

The forward Euler method creates a limited numerical calculation error, if the time interval Δt is small enough. This method has been used in previous work on cavitation, e.g. Sanders, Dadfarnia52, Margolin, Gulenko 53. Fig. C1 presents calculation results on the basis of different Δt values. It is clear that Δt =0.5 s generates a marginal difference (less than 2.5%) when compared with those using any smaller values (e.g. Δt =0.1, 0.05 s). Thus the selection of Δt =0.5 is justified.