Rainbow trout provide the first experimental evidence for adherence to a distinct Strouhal number during animal oscillatory propulsion.

@article{Nudds2014RainbowTP,
  title={Rainbow trout provide the first experimental evidence for adherence to a distinct Strouhal number during animal oscillatory propulsion.},
  author={Robert L Nudds and Eksterowicz John and Adam N. Keen and Holly A Shiels},
  journal={The Journal of experimental biology},
  year={2014},
  volume={217 Pt 13},
  pages={
          2244-9
        }
}
The relationship between tail (or wing) beat frequency (f(tail)), amplitude (A) and forward velocity (U) in animals using oscillatory propulsion, when moving at a constant cruising speed, converges upon an optimum range of the Strouhal number (St = f(tail) · A/U). Previous work, based on observational data and supported by theory, shows St falling within the broad optimum range (0.2<St<0.4) and considers this adequate to indicate its importance in governing wing or tail kinematics. This study… CONTINUE READING

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