High-precision bio-replication of synthetic drag reduction shark skin

Fluid Drag Reduction with Shark - Skin Riblet Inspired

Inspired by designs found throughout living nature, researchers are reverse engineering the world’s fl ora and fauna to solve technical challenges. Much attention is given to structures and materials since living nature effi ciently uses resources and incorporates ingenious designs to survive. Therefore by using lessons from living nature, bioinspired designs are serving as the basis for many n...

Preparation, anti-biofouling and drag-reduction properties of a biomimetic shark skin surface

Shark skin surfaces show non-smoothness characteristics due to the presence of a riblet structure. In this study, biomimetic shark skin was prepared by using the polydimethylsiloxane (PDMS)-embedded elastomeric stamping (PEES) method. Scanning electron microscopy (SEM) was used to examine the surface microstructure and fine structure of shark skin and biomimetic shark skin. To analyse the hydro...

Shark-skin surfaces for fluid-drag reduction in turbulent flow: a review.

The skin of fast-swimming sharks exhibits riblet structures aligned in the direction of flow that are known to reduce skin friction drag in the turbulent-flow regime. Structures have been fabricated for study and application that replicate and improve upon the natural shape of the shark-skin riblets, providing a maximum drag reduction of nearly 10 per cent. Mechanisms of fluid drag in turbulent...

Numerical Investigation on the Effect of Tunnel Height on Drag Reduction in a High Speed Trimaran

There are different methods to reduce drag in high speed hulls. One of these methods is a change in the shape of the body by adding longitudinal side tunnels. In this paper it has been attempted to determine the influence of the tunnel height on hydrodynamic characteristics of the hull to achieving an optimum shape for the tunnel. To achieve this purpose, numerical simulation of the problem has...

Shark skin and locomotion.