0470325 - ÚCHP 2017 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Vejražka, Jiří - Zedníková, Mária - Stanovský, Petr
Characterization of Turbulent Flow in a Breakup Cell.
Proceedings of the International Conference Experimental Fluid Mechanics. Karlovy Vary: Polypress, 2016 - (Dančová, P.), s. 890-896. ISBN N.
[Experimental Fluid Mechanics 2016. Mariánské Lázně (CZ), 15.11.2016-18.11.2016]
Grant CEP: GA ČR GA15-15467S
Institucionální podpora: RVO:67985858
Klíčová slova: turbulent flow * particle image velocimetry * breakup cell
Kód oboru RIV: CI - Průmyslová chemie a chemické inženýrství

Our research focuses on breakup of bubbles and drops induced by a flow turbulence. In this contribution, we describe the experimental setup used for studying the breakup, and we characterize flow within it. The setup is a rectangular glass cell, in which a turbulent flow is generated by a set of coaxial nozzles. The flow within it is characterized by means of particle image velocimetry. From the velocity data, i) local dissipation rate (ε) is estimated using Large-Eddy PIV method, and ii) statistics of velocity difference in two points is evaluated. Estimation of ε is validated by integrating the total dissipation in the setup, which reasonably agrees with the injected kinetic energy. The probability density function of velocity difference is non-Gaussian and when properly normalized, it is universal within the setup.
Trvalý link: http://hdl.handle.net/11104/0268000