According to the invention, every immersed jet (1, 2, 3) provokes turbulences (21) as a result of resistance in the medium in which it is submerged. All the energy applied is distributed in turbulent flows at the end of its working range. These turbulent flows are generally local, that is small scale. Yet these small scale turbulences have a strong eroding effect. The invention aims at producing the highest possible amount of small scale turbulences and at distributing said turbulences over a large volume, large meaning, for example, 3000-4000 m3 on a surface of 2000 m2 and a height of 2 m, as is the case, for instance of a storage tank (10) with a 50 m diameter and a liquid column of 3 m. The problem then lies in the optimal distribution of the energy applied.
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