Fig. 12 | Scientific Reports

Fig. 12

From: Numerical investigation of wake interaction and bio-inspired propulsive performance of tandem flapping foils for soft-robotic underwater locomotion

Fig. 12The alternative text for this image may have been generated using AI.

Z-vorticity contours (− 20 to + 20; red: counter-clockwise, blue: clockwise) for upstream and downstream foils under in-phase (0°) flapping along FT-I and FT-II trajectories showing different wake–foil interaction regimes: (a, b) weak/no wake interaction, (c, d) direct wake-foil collision, and (e, f) partial interaction based on the proximity parameter (Πvf).

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