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National Repository of Grey Literature 3 records found  Search took 0.02 seconds. 
Oscillation of Interfacial Meniscus during the Formation of Bubbles
 Stanovský, Petr ; Růžička, Marek
A closer look at the interphase meniscus in the model system with a transparent plate using a high-speed camera has showed that after detachment of the bubble the meniscus moves to the lower orifice rim. On that rim the meniscus oscillate dumped by increasing pressure in the space below the plate. In the description of the bubble growth at the orifice during so called waiting period accrue the equations describing the oscillatory behavior of the meniscus. Together with the nonlinear Rayleigh-Plesset equation it results in a bifurcation behavior - the volume of bubbles ​​differ by up to 50% from the mean at certain values of the gas flow. This phenomenon has not been previously identified as the time-averaged values ​​of bubble sizes conceal this effect.
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Research of Multiphase Systems at ICPF AS CR Prague
 Zedníková, Mária ; Růžička, Marek ; Drahoš, Jiří
The aim of this contribution is to present to the Czech waste water treatment community the multiphase flow research at the ICPF ASCR. The goal of the research is to understand the basic physical mechanisms of flow systems with two or more phases. The interest covers a broad range of the multiphase flow systems; for instance: production and hydrodynamics of bubbly mixtures, flow regimes and their identification, effect of control parameters on the flow regimes, mass transfer in gas-liquid systems, bubble formation, coalescence and break-up, hydrodynamic interactions of bubbles, interaction of bubbles with solid particles, sedimentation of polydisperse mixtures etc.
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Influence of the Operational Parameters on the Periodicity of Bubble Formation at the Orifice
 Stanovský, Petr ; Růžička, Marek
Aim of this work is description of the design parameters influence (a chamber size under the plate V, the plate thickness L, the liquid level above plate H) on the occurrence of aperiodic bubble formation and their influence on the meniscus oscillations inside an orifice.
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