Figure 5 in Drag of suction cup tags on swimming animals: Modeling and measurement

Figure 5. Detail of the flow path-lines around Models A and B. (A) Flow lines in the vicinity of a forward suction cup mounting pillar at a flow speed of 5.6 m/s demonstrating the flow disturbance created by the suction cups. The eddies and reduced speed result in larger forces acting on the tag. (B) Improved flow around the Model B tag design results from screening of the cups. (C) Flow through the channel underneath the Model B design showing flow detachment near the aft end of the channel.