Abstract
Our aim is to clarify the propulsion mechanism of dolphins and fish and to investigate three-dimensional (3D) vortex structure in the wake of a tail fin. In this study, we replaced the pitching motion of a tail fin by an oscillating wing with a drive unit. Flow fields around the wing were measured by using stereo-PIV. To construct the 3D structure of the vortex in the wake, we determined the flow fields in cross-sectional planes spaced by an equal distance. We reconstructed the field of three components in 3D from the velocity data with three components in 2D. We visualized 3D vortex structure by calculating vorticity from this velocity data and plotting iso-vorticity surface. From the visualized result, the vortex ring was found to occur by the motion of kick-down and kick-up of the wing.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
