Wind Tunnel Study of the Forces Due to Drafting in Dolphin Mother-Calf pairs
Cetacean Calves keep up with their mothers while rapidly swimming, by a hydrodynamical effect called drafting. This has been observed in the wild and enclosed areas, and has been mathematically analyzed in the past, but no quantitative measures of the actual forces involved have been made. We built wind tunnel models of Mother-Calf pairs and present force measures for various geometries and relative placements.We show that under certain configurations, the drafting forces are large enough to carry the calf along effortlessly.
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