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Lernen von der Haut eines Delphins- Analyse der Beziehung zwischen Hautmorphologie und den lokalen Strömumgsbedingungen eines schnell schwimmenden Delphins

Projektdaten

Förderung: Deutsche Forschungsgemeinschaft, Bonn
Projektleitung: Prof. Dr. Ursula Siebert
Wiss. Bearbeitung: Vadim Pavlov, PHD

Projektbeschreibung

 

Study of the potential drag-reducing properties of dolphin skin.  Morphological features of skin relevant to the reduction of friction drag were studied in the context of hydrodynamic performance of dolphin. For that purpose computer-aided design models of fast (common dolphin) and slow (harbor porpoise) species were constructed. Flow parameters were calculated for the typical swimming speeds and compared with local skin morphology data. It was shown that dolphin skin structure is similar to the anisotropic compliant walls and has a potential in friction drag reduction. Passive flow stabilization mechanism appears more effective in fast-swimming speices.


 

    

Figure 1. CAD model presenting authentic geometry of the harbor porpoise Phocoena phocoena.

Figure 2. Distribution of the friction coefficient on the harbor porpoise model at slow speed of swimming, V. Pavlov, D. Riedeberger.

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Video 1. Distribution of the friction coefficient on the model of common dolphin Delphinus delphis at moderate speed of swimming, V. Pavlov, D. Riedeberger.

 

 

Figure 3. Skin morphology of the common dolphin. Basic measurements of the skin features.

 

 

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Video 2. 3D structure of the dolphin skin dermis.

 

 

 

Figure 4. Skin morphology and hydrodynamics of the harbor porpoise dorsal fin.

Ansprechpartner

Stiftung Tierärztliche Hochschule Hannover

Institut für Terrestrische und Aquatische Wildtierforschung

Werftstr. 6

25761 Büsum

 

Apl. Prof. Dr. Ursula Siebert

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