Positive pressure matters in acoustic droplet vaporization
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866915367202324480 |
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| author | Fiorini, Samuele Prasanna, Anunay Shakya, Gazendra Cattaneo, Marco Supponen, Outi |
| author_facet | Fiorini, Samuele Prasanna, Anunay Shakya, Gazendra Cattaneo, Marco Supponen, Outi |
| contents | Acoustically vaporizable droplets are phase-change agents that can improve the effectiveness of ultrasound-based therapies. In this study, we demonstrate that the compression part of an acoustic wave can generate tension that initiates the vaporization. This counter-intuitive process is explained by the occurrence of Gouy phase shift due to the focusing of the acoustic wave inside the droplet. Our analysis unifies the existing theories for acoustic droplet vaporization under a single framework and is supported by experiments and simulations. We use our theory to identify governing parameters that allow to vaporize droplets using predominantly compression waves, which are safer in medical use. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_16455 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Positive pressure matters in acoustic droplet vaporization Fiorini, Samuele Prasanna, Anunay Shakya, Gazendra Cattaneo, Marco Supponen, Outi Fluid Dynamics Acoustically vaporizable droplets are phase-change agents that can improve the effectiveness of ultrasound-based therapies. In this study, we demonstrate that the compression part of an acoustic wave can generate tension that initiates the vaporization. This counter-intuitive process is explained by the occurrence of Gouy phase shift due to the focusing of the acoustic wave inside the droplet. Our analysis unifies the existing theories for acoustic droplet vaporization under a single framework and is supported by experiments and simulations. We use our theory to identify governing parameters that allow to vaporize droplets using predominantly compression waves, which are safer in medical use. |
| title | Positive pressure matters in acoustic droplet vaporization |
| topic | Fluid Dynamics |
| url | https://arxiv.org/abs/2407.16455 |