Analysis of the Relation between Skin Morphology and Local Flow Conditions for a Fast-Swimming Dolphin

  • Vadim Pavlov
  • Donald Riedeberger
  • Ulrich Rist
  • Ursula Siebert
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 119)

summary

The dolphin skin close to the anisotropic compliant wall design could potentially reduce the friction drag. The goal of this work was to study the relation between local flow conditions around dolphin model and parameters of skin morphology relevant in flow/skin interface. Three-dimensional CAD models presenting authentic geometry of fast-swimming common dolphin Delphinus delphis and low-swimming harbor porpoise Phocaena phocaena were constructed. CFD study of the flow parameters were carried out for the natural range of dolphin swimming velocities. The results of this study allow to conclude that the stream-wise variability of the dolphin skin structure appears to be associated with the streamlined body geometry and corresponding gradients of the velocity and pressure rather than with specific local Re numbers. The hypotheses on different optimal conditions for potential drag-reducing properties of dolphin skin are proposed.

Keywords

Drag Reduction Harbor Porpoise Friction Drag Common Dolphin Compliant Wall 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Berlin Heidelberg 2012

Authors and Affiliations

  • Vadim Pavlov
    • 1
  • Donald Riedeberger
    • 2
  • Ulrich Rist
    • 2
  • Ursula Siebert
    • 1
  1. 1.Institute of Terrestrial and Aquatic Wildlife ResearchUniversity of Veterinary Medicine Hannover, FoundationBüsumGermany
  2. 2.Institute of Aerodynamics and Gas DynamicsUniversity of StuttgartStuttgartGermany

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