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 M20: Biological Fluid Dynamics: Locomotion Swimming - Fishes I
8:00 AM–10:10 AM,
Tuesday, November 20, 2018
Georgia World Congress Center Room: B308
Chair: Alexandra Techet, Massachusetts Institute of Technology
Abstract ID: BAPS.2018.DFD.M20.8
Abstract: M20.00008 : Flow Interactions and Performance Benefits in Fish Schools*
9:31 AM–9:44 AM
Keith W Moored
In nature fish are known to aggregate into large schools or collectives. It has long been argued that these collectives are formed for social reasons, as a protection strategy against predators, and even to save energy. However, our knowledge of the fluid dynamic interactions that occur among individuals and their collective energetics is based mostly on two-dimensional analyses. Here, we examine the role of three-dimensionality in altering the flow interactions, the force generation, and the energetics of two interacting swimmers. We model our two swimmers as simple finite-span pitching propulsors. Additionally, the positions of the two propulsors are configured in mixtures of canonical side-by-side and in-line arrangements. The forces and moments are then measured as the two wings undergo sinusoidal pitching motions over a large range of synchrony and spacing. Our aim is to identify the flow mechanisms that improve or degrade propulsive performance of individuals within a collective as well as to identify flow mechanisms that give rise to fluid-mediated forces among individuals.
*This work was supported by the National Science Foundation under Program Director Dr. Ronald Joslin in Fluid Dynamics within CBET on NSF award number 1653181.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.M20.8
The American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics.
1 Physics Ellipse, College Park, MD 20740-3844
Editorial Office 1 Research Road, Ridge, NY 11961-2701 (631) 591-4000
Office of Public Affairs 529 14th St NW, Suite 1050, Washington, D.C. 20045-2001 (202) 662-8700