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Literature DB >> 17671302

The myth and reality of Gray's paradox: implication of dolphin drag reduction for technology.

Abstract

The inconsistency for the calculated high drag on an actively swimming dolphin and underestimated muscle power available resulted in what has been termed Gray's paradox. Although Gray's paradox was flawed, it has been the inspiration for a variety of drag reduction mechanisms. This review examines the present state of knowledge of drag reduction specific to dolphins. Streamlining and special behaviors provide the greatest drag reduction for dolphins. Mechanisms to control flow by maintaining a completely laminar boundary layer over the body have not been demonstrated for dolphins.

Entities: Species

Mesh：

Substances：
Water

Year: 2006 PMID： 17671302 DOI： 10.1088/1748-3182/1/2/R01

Source DB: PubMed Journal: Bioinspir Biomim ISSN： 1748-3182 Impact factor: 2.956

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Cited

12 in total

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5. Confronting the physiological bottleneck: A challenge from ecomechanics.

Authors: Mark Denny; Brian Helmuth
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6. Experimental investigations on drag-reduction characteristics of bionic surface with water-trapping microstructures of fish scales.

Authors: Liyan Wu; Zhibin Jiao; Yuqiu Song; Cuihong Liu; Huan Wang; Yuying Yan
Journal: Sci Rep Date: 2018-08-15 Impact factor: 4.379

The myth and reality of Gray's paradox: implication of dolphin drag reduction for technology.

1. Elastic recoil action amplifies jaw closing speed in an aquatic feeding salamander.

Review 2. On the diverse roles of fluid dynamic drag in animal swimming and flying.

3. How smooth is a dolphin? The ridged skin of odontocetes.

4. Unique fur and skin structure in harbour seals (Phoca vitulina)--thermal insulation, drag reduction, or both?

5. Confronting the physiological bottleneck: A challenge from ecomechanics.

6. Experimental investigations on drag-reduction characteristics of bionic surface with water-trapping microstructures of fish scales.

7. Effects of body plan evolution on the hydrodynamic drag and energy requirements of swimming in ichthyosaurs.

8. Gray's paradox: a fluid mechanical perspective.

9. Experiment Research on Hot-Rolling Processing of Nonsmooth Pit Surface.

Review 10. Analysis of Drag Reduction Methods and Mechanisms of Turbulent.