Micro-jet formation induced by the interaction of a spherical and toroidal cavitation bubble

Mur, Jaka (avtor), Bußmann, Alexander (avtor), Paula, Thomas (avtor), Adami, Stefan (avtor), Adams, Nikolaus (avtor), Petkovšek, Rok (avtor), Ohl, Claus-Dieter (avtor)

We investigate experimentally and numerically the interaction between a spherical cavitation bubble and a wall-bounded toroidal cavitation bubble. We demonstrate that shock wave focusing following toroidal bubble initiation induces the formation of micro-jets that pierce the spherical bubble in the torus-axis direction away from the surface, strongest in the anti-phase scenario. The velocity of micro-jets is determined by the initial standoff distance of the spherical bubble from the wall and thus from the toroidal bubble, with peak jet velocities approaching 1000 m/s. The micro-jets are triggered by the complex interaction between the torus shock wave and the surface of the spherical bubble. Additionally, the formation of secondary cavitation appears to significantly enhance the micro-jets compared to scenarios without secondary cavitation. Following the formation of micro-jets, a subsequent broad jet pierces the spherical bubble, marking the onset of its collapse. After the collapse, we observe an amplified rebound phase resulting in a more than twofold increase of the bubble volume compared to the initial bubble.

• Jezik: Angleški jezik
• Ključne besede: cavitation bubbles, toroidal bubbles, micro-jet formation, secondary cavitation, amplified rebound
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2025
• Št. strani: 18 str.
• Številčenje: Vol. 112, [art. no.] 107185
• PID: 20.500.12556/RUL-166009
• UDK: 532.528
• ISSN pri članku: 1350-4177
• DOI: 10.1016/j.ultsonch.2024.107185
• COBISS.SI-ID: 219449347
• Datum objave v RUL: 17.12.2024

Gradivo je del revije

• Naslov: Ultrasonics sonochemistry
• Skrajšan naslov: Ultrason. sonochem.
• Založnik: Butterworth-Heinemann, Elsevier
• ISSN: 1350-4177
• COBISS.SI-ID: 707668

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.