20.500.12556/RUL-166009 Micro-jet formation induced by the interaction of a spherical and toroidal cavitation bubble 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. cavitation bubbles toroidal bubbles micro-jet formation secondary cavitation amplified rebound true false true Angleški jezik Angleški jezik Članek v reviji 2024-12-17 11:20:40 2024-12-17 11:20:44 2024-12-18 08:06:16 0000-00-00 00:00:00 2025 0 0 18 str. Vol. 112, [art. no.] 107185 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 532.528 1350-4177 10.1016/j.ultsonch.2024.107185 219449347 Mur_..._Micro-jet_formation_induced_by_the_interaction_of_a_spherical__....pdf Mur_..._Micro-jet_formation_induced_by_the_interaction_of_a_spherical__....pdf 1 0A7B452823C0503C02631EBA50FE9829 0d7168c30b1698051e740ce390eda95d6a9157e5253ab97d68ecd7282806e2a3 4bb10c7a-bc62-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=197369 https://www.sciencedirect.com/science/article/pii/S1350417724004346 1 09de3087-bc60-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=197368 Fakulteta za strojništvo 0 0 0