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| Titel: |
The Flow Induced by a Jellyfish |
| Auteur: |
Ichikawa, S. Mochizuki, O. |
| Verschenen in: |
Journal of visualization |
| Paginering: | Jaargang 11 (2008) nr. 3 pagina's 257-264 |
| Jaar: |
2008-09-12 |
| Inhoud: |
The purpose of this study is to understand the propulsion mechanism of a jellyfish during its swimming. We observed the motion of a jellyfish (Aurelia aurita) by a motion-capture camera, and measured the vector field of flow around a jellyfish by using a PIV (Particle Image Velocimetry) measurement. A jellyfish is considered to be principally propelled by a jet at the contracting phase of its motion. If that is true, it is interesting that a jellyfish never stops traveling even at the expanding phase. We found that a vortex ring with the opposite vorticity to shed vortex ring was inside a jellyfish body in the expanding phase. We discussed a cause of an increase in thrust force and keeping constant speed in the expanding phase. |
| Uitgever: |
IOS Press |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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