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...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Ultrasonics Sonochemistry |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1350417724004346 |
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| author | Jaka Mur Alexander Bußmann Thomas Paula Stefan Adami Nikolaus A. Adams Rok Petkovsek Claus-Dieter Ohl |
| author_facet | Jaka Mur Alexander Bußmann Thomas Paula Stefan Adami Nikolaus A. Adams Rok Petkovsek Claus-Dieter Ohl |
| author_sort | Jaka Mur |
| collection | DOAJ |
| description | 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 1000m/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. |
| format | Article |
| id | doaj-art-2751c13b2d684ebea8b06e76ebede178 |
| institution | Kabale University |
| issn | 1350-4177 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ultrasonics Sonochemistry |
| spelling | doaj-art-2751c13b2d684ebea8b06e76ebede1782025-01-11T06:38:46ZengElsevierUltrasonics Sonochemistry1350-41772025-01-01112107185Micro-jet formation induced by the interaction of a spherical and toroidal cavitation bubbleJaka Mur0Alexander Bußmann1Thomas Paula2Stefan Adami3Nikolaus A. Adams4Rok Petkovsek5Claus-Dieter Ohl6Faculty of Natural Sciences, Institute for Physics, Department Soft Matter, Otto-von-Guericke University Magdeburg, Magdeburg, 39106, Germany; Faculty of Mechanical Engineering, University of Ljubljana, Askerceva 6, Ljubljana, 1000, SloveniaChair of Aerodynamics and Fluid Mechanics, TUM School of Engineering and Design, Technical University of Munich, Garching bei München, 85748, Germany; Munich Institute of Integrated Materials, Energy and Process Engineering (MEP), Technical University of Munich, Garching bei München, 85748, GermanyChair of Aerodynamics and Fluid Mechanics, TUM School of Engineering and Design, Technical University of Munich, Garching bei München, 85748, Germany; Munich Institute of Integrated Materials, Energy and Process Engineering (MEP), Technical University of Munich, Garching bei München, 85748, GermanyChair of Aerodynamics and Fluid Mechanics, TUM School of Engineering and Design, Technical University of Munich, Garching bei München, 85748, Germany; Munich Institute of Integrated Materials, Energy and Process Engineering (MEP), Technical University of Munich, Garching bei München, 85748, GermanyChair of Aerodynamics and Fluid Mechanics, TUM School of Engineering and Design, Technical University of Munich, Garching bei München, 85748, Germany; Munich Institute of Integrated Materials, Energy and Process Engineering (MEP), Technical University of Munich, Garching bei München, 85748, GermanyFaculty of Mechanical Engineering, University of Ljubljana, Askerceva 6, Ljubljana, 1000, SloveniaFaculty of Natural Sciences, Institute for Physics, Department Soft Matter, Otto-von-Guericke University Magdeburg, Magdeburg, 39106, Germany; Research Campus STIMULATE, University of Magdeburg, Otto-Hahn-Straße 2, Magdeburg, 39106, Germany; Corresponding author at: Faculty of Natural Sciences, Institute for Physics, Department Soft Matter, Otto-von-Guericke University Magdeburg, Magdeburg, 39106, Germany.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 1000m/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.http://www.sciencedirect.com/science/article/pii/S1350417724004346Cavitation bubbleToroidal bubbleMicro-jet formationSecondary cavitationAmplified rebound |
| spellingShingle | Jaka Mur Alexander Bußmann Thomas Paula Stefan Adami Nikolaus A. Adams Rok Petkovsek Claus-Dieter Ohl Micro-jet formation induced by the interaction of a spherical and toroidal cavitation bubble Ultrasonics Sonochemistry Cavitation bubble Toroidal bubble Micro-jet formation Secondary cavitation Amplified rebound |
| title | Micro-jet formation induced by the interaction of a spherical and toroidal cavitation bubble |
| title_full | Micro-jet formation induced by the interaction of a spherical and toroidal cavitation bubble |
| title_fullStr | Micro-jet formation induced by the interaction of a spherical and toroidal cavitation bubble |
| title_full_unstemmed | Micro-jet formation induced by the interaction of a spherical and toroidal cavitation bubble |
| title_short | Micro-jet formation induced by the interaction of a spherical and toroidal cavitation bubble |
| title_sort | micro jet formation induced by the interaction of a spherical and toroidal cavitation bubble |
| topic | Cavitation bubble Toroidal bubble Micro-jet formation Secondary cavitation Amplified rebound |
| url | http://www.sciencedirect.com/science/article/pii/S1350417724004346 |
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