Cavitation Bubble Cloud Break-Off Mechanisms at Micro-Channels

This paper provides new physical insight into the coupling between flow dynamics and cavitation bubble cloud behaviour at conditions relevant to both inception more complex phenomenon of “choking” using a multiphase compressible framework. Understanding process parameters that determine its break-off frequency is important for control phenomena such as structure vibration erosion. Initially, role pressure waves in development investigated. We highlight differences “physical” “artificial” numerical by comparing cases with different boundary differencing schemes. analyse detail prediction micro-channel 20 μm high containing Diesel 7 MPa 8.5 MPa, corresponding "choking" respectively. The results have very good agreement experimental data demonstrate wave dynamics, rather than “re-entrant jet dynamics” suggested previous studies, characteristics under conditions.