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Methods of Turbulence Research
Uruba, Václav
In the key-note lecture the current state of the turbulence research is presented. The problems connected with mathematical modelling are presented in details, relevance and perspective of experimental research is pointed out.
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Velocity spectra and transition into turbulence in synthetic jets
Tesař, Václav
Paper investigates transition into turbulence in synthetic jet. The investigation was based on the quasi-similarity model with model parameter varying along the jet trajectory.The distance travelled from the nozzle to the location of the transition depends on the driving frequency – and hence on the size of the vortical structures, which were modelled by a sphetical vortex model. It appears the trasnsition takes placeat the distance equal to ~20 diameters of this model object.
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