Drag Coefficients and Reconfiguration

Based on the overall morphology, the eight individuals of D. antarctica were grouped as "wave exposed" or "intermediate/wave sheltered." Drag coefficients were calculated using Equation 3.1, and the planform area of the seaweeds was used for Ac, which is common for long flexible organisms, rather than the projected area [11]. The process of passive reconfiguration was examined by the Vogel number. Considering the factor ^2 pAcSd of Equation 3.2 as constant gives the following proportionality:

The Vogel number, B, can therefore be written as the slope of a double-logarithmic plot of the velocity-specific drag [log(_Fd / uj2)] as a function of velocity [log(ur )]. The greater the absolute value of the negative slope, the better the reconfiguration process was considered to be. The Vogel number was subsequently correlated with the previously recorded morphometrical parameters.

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