Národní úložiště šedé literatury Nalezeno 138 záznamů.  začátekpředchozí137 - 138  přejít na záznam: Hledání trvalo 0.00 vteřin. 
Nucleation and dynamics of bubbles in binary water-gas solution
Zima, Patrik ; Maršík, František
The paper deals with nucleation and dynamics of bubbles in water with dissolved contaminant gas. The nucleation model assumes binary solution of water and pure gas. Some attention is paid to the study of the effect of the dissolved gas on the onset of nucleation (cavitation). In addition, the presence of the gas component is reflected in the Rayleigh-Plesset equation, which describes the subsequent growth (and dynamics) of a bubble in a liquid. The derived equation for bubble radius assumes mass transfer across the bubble boundary, which is in the contrary to the previous and widely used assumptions of boundary impermeability and which appears to provide more realistic insights into bubble behavior. The effect of mass transfer across the bubble boundary is studied analytically and numerically. The natural frequency of the bubble is also shown for the studied problem.
Modelling of cavitated flows in hydraulic machinery using viscous flow computation and bubble dynamics model
Sedlář, M. ; Maršík, František ; Šafařík, Pavel
Numerical solution of the 3D Reynolds averaged Navier-Stokes equation is based on FEM. The turbulence is modelled through the high Reynolds number k-epsilon model. The cavitation region is modelled as a region of the lower density . The local radius of cavitating bubbles is obtained as a solution of Rayleigh-Plesset equation. The flow past the blades of an axial flow mixer is calculated.

Národní úložiště šedé literatury : Nalezeno 138 záznamů.   začátekpředchozí137 - 138  přejít na záznam:
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