The hydrodynamics of eel swimming
The hydrodynamics of American eels swimming steadily at 1.4 L s-1 are examined and it is inferred that the lack of downstream flow results from a spatial and temporal balance of momentum removal and thrust generated along the body, due to the relatively uniform shape of eels.
The hydrodynamics of eel swimming II. Effect of swimming speed
- E. Tytell
- Physics, Environmental ScienceJournal of Experimental Biology
- 1 September 2004
Lateral impulse in the wake is estimated assuming that the flow field represents a slice through small core vortex rings and is shown to be significantly larger than forces estimated from the kinematics via elongated body theory and via quasi-steady resistive drag forces, indicating that unsteady effects are important in undulatory force production.
Hydrodynamics of Undulatory Propulsion
Median fin function in bluegill sunfish Lepomis macrochirus: streamwise vortex structure during steady swimming
- E. Tytell
- Biology, PhysicsJournal of Experimental Biology
- 15 April 2006
This study analyzes flow in the transverse plane at a range of positions around bluegill sunfish Lepomis macrochirus, from the trailing edges of the dorsal and anal fins to the near wake, and proposes a three-dimensional structure of the vortex wake in which vortices from the caudal notch are elongated by the dorso-ventral cupping motion of the tail.
The hydrodynamics of eel swimming: I. Wake structure
with a clear thrust
Hydrodynamics of the escape response in bluegill sunfish, Lepomis macrochirus
The results underscore the importance of the dorsal and anal fins as propulsors and suggest that the size and placement of these fins may be a key determinant of fast start performance.
Interactions between internal forces, body stiffness, and fluid environment in a neuromechanical model of lamprey swimming
- E. Tytell, Chia-Yu Hsu, T. Williams, A. Cohen, L. Fauci
- Biology, EngineeringProceedings of the National Academy of Sciences
- 29 October 2010
Results indicate that identical muscle activation patterns can produce different kinematics depending on body stiffness, and the optimal value of stiffness for maximum acceleration is different from that for maximum steady swimming speed.
Kinematics and hydrodynamics of linear acceleration in eels, Anguilla rostrata
- E. Tytell
- Physics, EngineeringProceedings of the Royal Society of London…
- 22 December 2004
The kinematics and hydrodynamics of routine linear accelerations were studied in American eels, Anguilla rostrata, using highóspeed video and particle image velocimetry, suggesting that eels primarily change their tailótip velocity during acceleration.
Disentangling the functional roles of morphology and motion in the swimming of fish.
- E. Tytell, I. Borazjani, F. Sotiropoulos, T. Baker, E. Anderson, G. Lauder
- Environmental Science, PhysicsIntegrative and Comparative Biology
- 1 December 2010
Experimental results from swimming eels, bluegill sunfish, and rainbow trout that demonstrate differences in the wakes and in swimming performance are presented, and both experimental and computational results indicate that anguilliform swimmers are more efficient at lower swimming speeds, while carangiform swimming are moreefficient at high speed.
The C-start escape response of Polypterus senegalus: bilateral muscle activity and variation during stage 1 and 2.
The fast-start escape response is the primary reflexive escape mechanism in a wide phylogenetic range of fishes and Polypterus senegalus shows a wide range of activity patterns, from very strong responses, in which the head often touched the tail, to very weak responses.