Mixing in a turbulent multiscale flow

Abstract eng:
Results of a study examining the mixing of a passive scalar downstream of different single and multiscale turbulence generators (arrays of bars of various thicknesses) are reported in this work. Three different experiments were performed, each consisting of simultane- ous velocity and concentration measurements, involving different dye release conditions: a mixing layer (solely in terms of the concentration field, the velocity field was uniform), a single point continuous release and a single point discrete release. The data was used to quantify the different mixing performance of the considered turbulence generators. Some concentration results are further linked to secondary coherent structures revealed during the velocity field analysis.

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