Ver Post
Seminário no DEM - 4a feira dia 13 às 16h
12 Setembro 2017, 17:18 - Jorge Manuel Fontes Coelho
Title: Scaling, intermittency and non-gaussianity in turbulence - a symmetry approach
Prof. Martin Oberlack (Technische Universität Darmstadt )
Abstract:
During the last 20 years the lecturer and his co-workers have developed
a (Lie) symmetry based turbulence theory. One of the key results were
the fact, that all three fundamental statistical equations of
turbulence, as there are the multi-point moment equations, the
Lundren-Monin-Novikov hierarchy of multi-point pdf and the Hopf
functional approach admit a set of symmetries which go beyond the
classical Galilean group of the original Navier-Stokes equations. These
new statistical symmetries mirror important properties such as
intermittency and non-gaussianity. In turn, the entire set of symmetries
were used to derive new turbulent scaling laws such as for free and
wall-bounded shear flows. Most important, the theory also gave the form
of the scaling laws for higher moments.