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Development of functional textiles for hydrodynamically stressed and air-trapping interfaces (Hydrotex)

The friction between water and solids contributes to energy consumption in shipping. For vessels the friction between the hull and water accounts approximately for 90% at low speeds and 45% at high speeds on the total resistance. The project Hydrotex aims to achieve lower wall friction through a permanent layer of air in the solid-water interface using a fiber-based bionic textile approach. Such layers of air are known from plants and animals. At this aim, the companies Frottana - Textile GmbH & Co. KG, Rivers and Tides Boatbuilding and the research partners Institut für Textil- und Verfahrenstechnik Denkendorf (ITV), the Department of Geosciences at the University of Tübingen and the imare GmbH work on practical solutions and physical theories for the optimization of the desired bionic effects.

Within the collaboration imare carries out immersions testings and identifies defects caused by microfouling employing light and laser-optical methods and staining techniques. Selected textile surfaces are transferred to wing sections in order to investigate in detail their capacity to keep air under flow in a flow channel. This includes the calculation of shear rates from the foils by particle imaging velocimetry (PIV). Based on the results of static tests imare applies scaled constructions for field experiments which simulate the environmental conditions for boats in harbors.

: Dr. Christof Baum, Project duration: 01.10.2012 - 30.09.2014.

The project is funded by Zentrales Innovationsprogramm Mittelstand (ZIM). Project code KF2967002CJ2.



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