Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session E20: Biological Fluid Dynamics: Locomotion Flapping
5:10 PM–6:28 PM,
Sunday, November 18, 2018
Georgia World Congress Center Room: B308
Chair: Sachin Shinde, Indian Institute of Technology, Kanpur
Abstract ID: BAPS.2018.DFD.E20.3
Abstract: E20.00003 : Hydrodynamics of a trapezoidal self-propelled flexible plate.*
5:36 PM–5:49 PM
Hyung Jin Sung
(KAIST , KAIST)
A trapezoidal self-propelled flexible plate in a quiescent flow was simulated using an immersed boundary method. The shape ratio (S = Wt/Wl) was defined as the ratio of the trailing edge width (Wt) to the leading edge width (Wl). To reveal the hydrodynamics of the plate, the averaged cruising speed (Uc), the input power (P), and the swimming efficiency (η) were analyzed as a function of the bending rigidity (γ) and the shape ratio (S). The three-dimensional effect on the dynamics of the plate was scrutinized with the kinematics such as the peak-to-peak amplitude (At/A) and the Strouhal number (St). The elongated body theory was adopted to see the relation between the kinematics and dynamics. The maximum angle of attack (Φmax) and the mean effective length (Leff) were examined to account for the hydrodynamics of the self-propelled flexible plate. The vortical structures around the plate were visualized, and the influence of the tip vortex on the swimming efficiency was explored qualitatively and quantitatively.
*This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIT) (No. 2018001483).
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.E20.3
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