Called Vivace, an original energy recovery system would, according to its designer, make it possible to take advantage of very weak currents, in the ocean, rivers or rivers. Simple in principle and in implementation, this technique uses the turbulence generated by an obstacle.
In rivers or oceans, water, in general, moves slowly. Fast currents are the exception. However, the systems hitherto imagined to recover this energy, made up of turbines, most often need high speeds. It was while thinking of the huge untapped deposit of weak currents that Timothy Wootton, professor at Michigan College of Engineering, wanted to be inspired by ... fish and turbulence. The idea is to use the naturally created vortices, for example, downstream of a bridge pier in a river. Timothy Wootton has studied them for a long time and recalls that the first description of this phenomenon is to be attributed to Leonardo da Vinci.
Always considered to be destructive, these vortices very effectively degrade the banks, whether natural or artificial, and hydrology specialists have only studied them to better combat them. They also exist in the atmosphere under the effect of the wind and are responsible for the spectacular collapse of the Tacoma Bridge in November 1940 in the United States (Washington State).
http://www.futura-sciences.com/fr/news/t/developpement-durable-1/d/de-lenergie-dans-les-rivieres-et-les-moindres-courants-deau_17448/
I do not know.
And you ?
