Effect of temperature on rectified diffusion during ultrasound-induced heating.
Experimental observations of delayed-onset cavitation during ultrasound insonation have been suggested as being caused by a change in the size distribution of the bubble population due to rectified diffusion. To investigate this hypothesis, a single bubble model is used here to explore the effect of...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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2011
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| _version_ | 1797089070432649216 |
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| author | Webb, I Payne, S Coussios, C |
| author_facet | Webb, I Payne, S Coussios, C |
| author_sort | Webb, I |
| collection | OXFORD |
| description | Experimental observations of delayed-onset cavitation during ultrasound insonation have been suggested as being caused by a change in the size distribution of the bubble population due to rectified diffusion. To investigate this hypothesis, a single bubble model is used here to explore the effect of heating and the subsequent elevated temperatures on the rectified diffusion process. Numerical solution of the model, which includes the temperature dependences of seven relevant physical parameters, allows quantification of the change in the pressure threshold for rectified diffusion, as well as the importance of the bulk liquid saturation concentration in determining bubble evolution. Although elevated temperatures and liquid supersaturation reduce the rectified diffusion threshold, it remains coincident with the inertial cavitation thresholds at submicron bubble sizes at all temperatures. This observation suggests that changes in the nucleation environment, rather than bubble growth due to rectified diffusion, is a more likely cause of delayed-onset cavitation events. |
| first_indexed | 2024-03-07T02:59:12Z |
| format | Journal article |
| id | oxford-uuid:b05d9543-249f-468a-b57e-0eacc1b41df3 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:59:12Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | oxford-uuid:b05d9543-249f-468a-b57e-0eacc1b41df32022-03-27T03:55:54ZEffect of temperature on rectified diffusion during ultrasound-induced heating.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:b05d9543-249f-468a-b57e-0eacc1b41df3EnglishSymplectic Elements at Oxford2011Webb, IPayne, SCoussios, CExperimental observations of delayed-onset cavitation during ultrasound insonation have been suggested as being caused by a change in the size distribution of the bubble population due to rectified diffusion. To investigate this hypothesis, a single bubble model is used here to explore the effect of heating and the subsequent elevated temperatures on the rectified diffusion process. Numerical solution of the model, which includes the temperature dependences of seven relevant physical parameters, allows quantification of the change in the pressure threshold for rectified diffusion, as well as the importance of the bulk liquid saturation concentration in determining bubble evolution. Although elevated temperatures and liquid supersaturation reduce the rectified diffusion threshold, it remains coincident with the inertial cavitation thresholds at submicron bubble sizes at all temperatures. This observation suggests that changes in the nucleation environment, rather than bubble growth due to rectified diffusion, is a more likely cause of delayed-onset cavitation events. |
| spellingShingle | Webb, I Payne, S Coussios, C Effect of temperature on rectified diffusion during ultrasound-induced heating. |
| title | Effect of temperature on rectified diffusion during ultrasound-induced heating. |
| title_full | Effect of temperature on rectified diffusion during ultrasound-induced heating. |
| title_fullStr | Effect of temperature on rectified diffusion during ultrasound-induced heating. |
| title_full_unstemmed | Effect of temperature on rectified diffusion during ultrasound-induced heating. |
| title_short | Effect of temperature on rectified diffusion during ultrasound-induced heating. |
| title_sort | effect of temperature on rectified diffusion during ultrasound induced heating |
| work_keys_str_mv | AT webbi effectoftemperatureonrectifieddiffusionduringultrasoundinducedheating AT paynes effectoftemperatureonrectifieddiffusionduringultrasoundinducedheating AT coussiosc effectoftemperatureonrectifieddiffusionduringultrasoundinducedheating |