Drag coefficients of the tested seaweeds were highly dependent on velocity (Figure 3.9). The mean of the drag coefficients decreased hyperbolically with increasing velocity, using Equation 3.1 and keeping Ac constant. At all tested velocities, the mean drag coefficients of the group with wave-exposed morphology were always lower than the ones of the group with intermediate/wave-sheltered morphology. The minimum mean drag coefficient was found for the wave-exposed group at a velocity of 2.8 m s-1 at Cd = 0.023. The maximum mean drag coefficient was recorded for the intermediate/wave-sheltered group at a velocity of 0.5 m s-1 at Cd = 0.147. The variation in Cd expressed by the standard deviation decreased for both groups with increasing velocity.
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