Laser induced cavitations with a holographic grating.
In this work the dynamics of laser induced cavitation bubbles is studied with methods of high-speed photography. In the first part of this project we report on the importnac of the geometry. The bubbles are created in liquid gaps of different heights, in this way we were able to reveal the importanc...
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| Other Authors: | |
| Format: | Final Year Project (FYP) |
| Language: | English |
| Published: |
2009
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| Online Access: | http://hdl.handle.net/10356/18031 |
| _version_ | 1826120240971382784 |
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| author | Lim, Kang Yuan. |
| author2 | Claus-Dieter Ohl |
| author_facet | Claus-Dieter Ohl Lim, Kang Yuan. |
| author_sort | Lim, Kang Yuan. |
| collection | NTU |
| description | In this work the dynamics of laser induced cavitation bubbles is studied with methods of high-speed photography. In the first part of this project we report on the importnac of the geometry. The bubbles are created in liquid gaps of different heights, in this way we were able to reveal the importance of constraining the flow. In the unconstrained case we find a good agreement with the 3 dimensional Rayleigh-Plesset equation describing the collapse of a bubble in an infinite liquid. In constrained geometries, the bubble dynamics is modified and a lifetime of the bubble is observed, in particular, the collapse phase is retarded.
On the second part, different shaped bubbles are created with a spatial light modulator. Three different ways are demonstrated to obtain bubbles of non-spherical shape, e.g. 4-sided (rectangular) bubbles, donut-shaped bubbles, triangular bubbles, love-shaped bubbles, oval-shaped bubble, and jet forming V-shaped bubbles. |
| first_indexed | 2024-10-01T05:13:17Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/18031 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:13:17Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | ntu-10356/180312023-02-28T23:14:34Z Laser induced cavitations with a holographic grating. Lim, Kang Yuan. Claus-Dieter Ohl School of Physical and Mathematical Sciences DRNTU::Science::Physics::Heat and thermodynamics In this work the dynamics of laser induced cavitation bubbles is studied with methods of high-speed photography. In the first part of this project we report on the importnac of the geometry. The bubbles are created in liquid gaps of different heights, in this way we were able to reveal the importance of constraining the flow. In the unconstrained case we find a good agreement with the 3 dimensional Rayleigh-Plesset equation describing the collapse of a bubble in an infinite liquid. In constrained geometries, the bubble dynamics is modified and a lifetime of the bubble is observed, in particular, the collapse phase is retarded. On the second part, different shaped bubbles are created with a spatial light modulator. Three different ways are demonstrated to obtain bubbles of non-spherical shape, e.g. 4-sided (rectangular) bubbles, donut-shaped bubbles, triangular bubbles, love-shaped bubbles, oval-shaped bubble, and jet forming V-shaped bubbles. Bachelor of Science in Physics 2009-06-19T02:10:35Z 2009-06-19T02:10:35Z 2009 2009 Final Year Project (FYP) http://hdl.handle.net/10356/18031 en 64 p. application/pdf |
| spellingShingle | DRNTU::Science::Physics::Heat and thermodynamics Lim, Kang Yuan. Laser induced cavitations with a holographic grating. |
| title | Laser induced cavitations with a holographic grating. |
| title_full | Laser induced cavitations with a holographic grating. |
| title_fullStr | Laser induced cavitations with a holographic grating. |
| title_full_unstemmed | Laser induced cavitations with a holographic grating. |
| title_short | Laser induced cavitations with a holographic grating. |
| title_sort | laser induced cavitations with a holographic grating |
| topic | DRNTU::Science::Physics::Heat and thermodynamics |
| url | http://hdl.handle.net/10356/18031 |
| work_keys_str_mv | AT limkangyuan laserinducedcavitationswithaholographicgrating |