Cavitation produced by short pulses of ultrasound
Experimentally determined transient cavitation thresholds in water have, in the past, exceeded theoretical predications by a factor of two or more. This discrepancy is attributed to the a priori assumption that cavitation evolves from free-bubble nuclei, a condition which is difficult to recreate ex...
| Autori principali: | , , |
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| Natura: | Conference item |
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Elsevier
1990
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| _version_ | 1826276525679312896 |
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| author | Roy, R Church, C Calabrese, A |
| author_facet | Roy, R Church, C Calabrese, A |
| author_sort | Roy, R |
| collection | OXFORD |
| description | Experimentally determined transient cavitation thresholds in water have, in the past, exceeded theoretical predications by a factor of two or more. This discrepancy is attributed to the a priori assumption that cavitation evolves from free-bubble nuclei, a condition which is difficult to recreate experimentally. An experiment is described in which thresholds are measured at two different frequencies (1.0 and 2.25 MHz) in clean water seeded with stabilized microbubbles (Albunex®). A modified free-bubble theory is presented in which the microbubble is modeled as a gas-filled, spherical cavity surrounded by a layer of surface active material. Numerical predictions based on this model compare favorably with the measured cavitation thresholds. |
| first_indexed | 2024-03-06T23:15:17Z |
| format | Conference item |
| id | oxford-uuid:66eb5084-4000-41fc-a017-bda4ed1a1da7 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T23:15:17Z |
| publishDate | 1990 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:66eb5084-4000-41fc-a017-bda4ed1a1da72022-03-26T18:34:52ZCavitation produced by short pulses of ultrasoundConference itemhttp://purl.org/coar/resource_type/c_5794uuid:66eb5084-4000-41fc-a017-bda4ed1a1da7Symplectic Elements at OxfordElsevier1990Roy, RChurch, CCalabrese, AExperimentally determined transient cavitation thresholds in water have, in the past, exceeded theoretical predications by a factor of two or more. This discrepancy is attributed to the a priori assumption that cavitation evolves from free-bubble nuclei, a condition which is difficult to recreate experimentally. An experiment is described in which thresholds are measured at two different frequencies (1.0 and 2.25 MHz) in clean water seeded with stabilized microbubbles (Albunex®). A modified free-bubble theory is presented in which the microbubble is modeled as a gas-filled, spherical cavity surrounded by a layer of surface active material. Numerical predictions based on this model compare favorably with the measured cavitation thresholds. |
| spellingShingle | Roy, R Church, C Calabrese, A Cavitation produced by short pulses of ultrasound |
| title | Cavitation produced by short pulses of ultrasound |
| title_full | Cavitation produced by short pulses of ultrasound |
| title_fullStr | Cavitation produced by short pulses of ultrasound |
| title_full_unstemmed | Cavitation produced by short pulses of ultrasound |
| title_short | Cavitation produced by short pulses of ultrasound |
| title_sort | cavitation produced by short pulses of ultrasound |
| work_keys_str_mv | AT royr cavitationproducedbyshortpulsesofultrasound AT churchc cavitationproducedbyshortpulsesofultrasound AT calabresea cavitationproducedbyshortpulsesofultrasound |