Fig. 1. Diagram of experimental setup

Fig. 2. Schematics of main experimental parameters. (a) Initial cavitation bubble and oil film; (b) deformation of upper interface of oil film after bubble collapse

Fig. 3. Morphological changes during cavitation bubble collapse (D=0.195 mm,γ=1.57)

Fig. 4. Dimensionless centroid displacement of cavitation bubble versus ζ at different thicknesses

Fig. 5. Relative rebound radius of cavitation bubble versus anisotropy parameter ζ at different thicknesses

Fig. 6. Hump jet mode at upper interface of oil film (D=0.195 mm,γ=1.40)

Fig. 7. Thin jet mode at upper interface of oil film (D=0.195 mm,γ=0.45)

Fig. 8. Two-tier jet mode at upper interface of oil film (D=0.195 mm,γ=0.28)

Fig. 9. Slight disturbance mode at lower interface of oil film (D=0.195 mm,γ=1.40)

Fig. 10. Inverted hill deformation mode at lower interface of oil film (D=0.195 mm,γ=0.45)

Fig. 11. Cone deformation mode at lower interface of oil film (D=0.195 mm,γ=0.28)

Fig. 12. Partition maps of morphological evolutions of upper and lower interfaces. (a) Upper interface; (b) lower interface

Fig. 13. Dimensionless maximum height h_m versus dimensionless distance γ for hump jet