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Dynamika syntetizovaného paprsku
Uruba, Václav ; Knob, Martin ; Popelka, Lukáš
The paper presents recent results obtained in synthetic jet research in IT, Fluid Dynamics Department. The case in quiescent air is examined experimentally using time-resolved PIV method. Results concerning a synthetic jet mean characteristics and dynamics behaviour are presented.
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Numerical modelling of backward-facing step flow
Chára, Zdeněk ; Hoření, Bohumír
The contribution deals with a 3D numerical simulation of backward-facing step flow. The ratio of width to height of the channel before the expansion is 10:1, the height of the step is equal to the upstream channel height (expansion ratio is 2). Both the turbulent and the laminar flow regimes are simulated. The results will be used as a basis for experimental research, which will be focused on a mutual comparison of experimental methods – mainly LDA and PIV.
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Výzkum turbulance pomocí metod pro analýzu dynamických systémů
Uruba, Václav
Turbulence represent itself very important and common behaviour of real fluids. It is usually treated using special methods based on probabilistic approach. In the presented study methods originally developed for chaotic dynamical systems are applied to turbulent fluids. Problem of the continuous system discretization to develop phase space is analyzed in details.
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