Collaborations
K62SCAN: Experimental investigation of the refined similarity hypothesis
The K62SCAN project is an EuHIT funded collaboration between the LFPN research group at MPIDS and the fluid mechanics research group at NTNU. One of the most well-known statistical descriptions of turbulent flows, known as the refined similarity hypothesis, was proposed by Andrey Kolmogorov in 1962. It describes the statistics of velocity flucutations in turbulent flows at a given scale in terms of a scale-local rate of kinetic energy dissipation and the fluid viscosity. Until recently such tests were only possible experimentally by invoking a number of simplifying assumptions and surrogates, which have confounded the experimental evidence. Recent advances in experimental methods have made it possible to examine this theory directly. The K62SCAN project will deliver a series of experimental measurements which will allow direct experimental assessment of Kolmogorov's refined similarity hypothesis.
Experimental measurement and numerical simulation of extreme events in turbulent flows
In collaboration with the Wilczek Research group at MPIDS, we have developed experimental methods to examine the most rare and extreme acceleration events in turbulent flows at a fidelity sufficient to make quantitative, back-to-back comparisons with direct numerical simulations.