Influence of wall elasticity on growth and collapse of bubbles near a wall
The growth and collapse of a laser-induced bubble near an agarose gel were observed with a high-speed video camera in which 0.7% (Young's modulus E = 13 kPa), 1.5% (E = 55 kPa), 3.0% (E = 200 kPa), and 5.0% (E = 570 kPa) agarose gels were used as tissue-mimicking phantoms. The effects of Yo...
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2024-03-01
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| Series: | Journal of Fluid Science and Technology |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jfst/19/2/19_2024jfst0015/_pdf/-char/en |
| _version_ | 1827298887556136960 |
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| author | Tomoya MATSUKURA Hiroyuki TAKAHIRA |
| author_facet | Tomoya MATSUKURA Hiroyuki TAKAHIRA |
| author_sort | Tomoya MATSUKURA |
| collection | DOAJ |
| description | The growth and collapse of a laser-induced bubble near an agarose gel were observed with a high-speed video camera in which 0.7% (Young's modulus E = 13 kPa), 1.5% (E = 55 kPa), 3.0% (E = 200 kPa), and 5.0% (E = 570 kPa) agarose gels were used as tissue-mimicking phantoms. The effects of Young's modulus of agarose and the dimensionless bubble-boundary distance γ on the dynamics of laser-induced bubbles, i.e., bubble oscillation time, bubble migration, bubble shape, jetting, and penetration of the liquid jet into the elastic wall were investigated. It was shown that as Young’s modulus of the wall increased, the amount of migration of the bubble centroid toward the wall increased. The results also showed that as γ decreased, the bubble shape in the late collapse stage changed from a spherical shape, a cone shape, and to a mushroom shape when E = 13, 55, and 200 kPa, while, when E = 570 kPa, it changed from a cone shape, a mushroom shape, and to a volcano shape: the threshold values of γ, where the bubble shape changed from a cone shape to a mushroom shape and from a mushroom shape to a volcanic shape, increased as E increased. These bubble shapes in the late collapse stage were determined from the bubble shapes at the maximum expansion. In the case of mushroom-shaped bubbles, the jet velocity was higher than volcano-shaped bubbles. The value of γ at the onset of the penetration of the liquid jet into the elastic wall increased with an increase in E. The penetration area of bubbles into the elastic wall took the maximum value when the bubble shape in the late collapse stage changed from a mushroom shape to a volcano shape. The difference between the bubble behavior near the agarose wall and that near the PAA wall was also discussed. |
| first_indexed | 2024-04-24T15:23:46Z |
| format | Article |
| id | doaj.art-b6fac4f8a7744f90b6863ce8db0f0401 |
| institution | Directory Open Access Journal |
| issn | 1880-5558 |
| language | English |
| last_indexed | 2024-04-24T15:23:46Z |
| publishDate | 2024-03-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Fluid Science and Technology |
| spelling | doaj.art-b6fac4f8a7744f90b6863ce8db0f04012024-04-02T07:08:56ZengThe Japan Society of Mechanical EngineersJournal of Fluid Science and Technology1880-55582024-03-01192JFST0015JFST001510.1299/jfst.2024jfst0015jfstInfluence of wall elasticity on growth and collapse of bubbles near a wallTomoya MATSUKURA0Hiroyuki TAKAHIRA1Department of Mechanical Engineering, Osaka Metropolitan UniversityDepartment of Mechanical Engineering, Osaka Metropolitan UniversityThe growth and collapse of a laser-induced bubble near an agarose gel were observed with a high-speed video camera in which 0.7% (Young's modulus E = 13 kPa), 1.5% (E = 55 kPa), 3.0% (E = 200 kPa), and 5.0% (E = 570 kPa) agarose gels were used as tissue-mimicking phantoms. The effects of Young's modulus of agarose and the dimensionless bubble-boundary distance γ on the dynamics of laser-induced bubbles, i.e., bubble oscillation time, bubble migration, bubble shape, jetting, and penetration of the liquid jet into the elastic wall were investigated. It was shown that as Young’s modulus of the wall increased, the amount of migration of the bubble centroid toward the wall increased. The results also showed that as γ decreased, the bubble shape in the late collapse stage changed from a spherical shape, a cone shape, and to a mushroom shape when E = 13, 55, and 200 kPa, while, when E = 570 kPa, it changed from a cone shape, a mushroom shape, and to a volcano shape: the threshold values of γ, where the bubble shape changed from a cone shape to a mushroom shape and from a mushroom shape to a volcanic shape, increased as E increased. These bubble shapes in the late collapse stage were determined from the bubble shapes at the maximum expansion. In the case of mushroom-shaped bubbles, the jet velocity was higher than volcano-shaped bubbles. The value of γ at the onset of the penetration of the liquid jet into the elastic wall increased with an increase in E. The penetration area of bubbles into the elastic wall took the maximum value when the bubble shape in the late collapse stage changed from a mushroom shape to a volcano shape. The difference between the bubble behavior near the agarose wall and that near the PAA wall was also discussed.https://www.jstage.jst.go.jp/article/jfst/19/2/19_2024jfst0015/_pdf/-char/encavitationlaser-induced bubblecollapseelastic wallyoung’s modulusagarosemigrationliquid jet |
| spellingShingle | Tomoya MATSUKURA Hiroyuki TAKAHIRA Influence of wall elasticity on growth and collapse of bubbles near a wall Journal of Fluid Science and Technology cavitation laser-induced bubble collapse elastic wall young’s modulus agarose migration liquid jet |
| title | Influence of wall elasticity on growth and collapse of bubbles near a wall |
| title_full | Influence of wall elasticity on growth and collapse of bubbles near a wall |
| title_fullStr | Influence of wall elasticity on growth and collapse of bubbles near a wall |
| title_full_unstemmed | Influence of wall elasticity on growth and collapse of bubbles near a wall |
| title_short | Influence of wall elasticity on growth and collapse of bubbles near a wall |
| title_sort | influence of wall elasticity on growth and collapse of bubbles near a wall |
| topic | cavitation laser-induced bubble collapse elastic wall young’s modulus agarose migration liquid jet |
| url | https://www.jstage.jst.go.jp/article/jfst/19/2/19_2024jfst0015/_pdf/-char/en |
| work_keys_str_mv | AT tomoyamatsukura influenceofwallelasticityongrowthandcollapseofbubblesnearawall AT hiroyukitakahira influenceofwallelasticityongrowthandcollapseofbubblesnearawall |