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Fig. 1. Recirculating flow tank with modifications for direct measurement of
reconfiguration. The overall length of the tank was 2.4 m; the working section
was 0.15 mx0.15 mx0.30 m (WxHxL). Algae (in the
working section) were inverted to keep the force transducer dry. The 45°
mirror allowed for the visualization of the frontal area of the alga as it
reconfigured in flow.