A series of experiments of high Reynolds number and low Froude number stratified turbulence are carried out at the Coriolis platform. Turbulence generated by an array of translating vertical cylinders in the presence of background stratification, with and without system rotation, are studied by means of PIV.
Three-dimensional velocity fields from the cake are retrieved, from which spectra, structure functions as well as different length scales can be calculated. Mixing efficiency for different buoyance Reynolds numbers is estimated. The results are compared with theoretical predictions as well as with results from Direct Numerical Simulations.
Erik Lindborg, Royal institute of technology, Stockholm, Sweden
P. Henrik Alfredsson, Royal Institute of Technoogy (KTH), Stockholm, Sweden
Pierre Augier, CNRS, Grenoble, France
Ashwin Vishnu Mohanan, Royal Institute of Technology, Stockholm, Sweden
Antonio Segalini, KTH Mechanics, Stockholm, Sweden
Joel Sommeria, Centre National de la Recherche Scientifique, Grenoble, France