On the Strouhal Number of Fish Undulatory Swimming: A Simple Predictive Analysis Based on the Buckling of Columns

Page:

217-232

DOI:

https://doi.org/10.2495/D&N-V2-N3-217-232

OPEN ACCESS

Abstract:

An analogy between fi sh undulatory swimming and the buckling of columns is presented and discussed. The most important aspects of the undulatory swimming of a fi sh, from the mechanical point of view, are described. The buckling response of solid and fl uid columns and its mathematical modelling are summarized and applied to a swimming fi sh, as an analogue of buckling columns. The predictable Strouhal number for a buckling fi sh agrees well with the apparently universal experimental value observed by numerous investigators of fi sh undulatory swimming.

Keywords:

*buckling of columns, fi sh undulatory swimming, fl uid columns, hydrodynamic foils, solid columns, Strouhal number.*

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