Abstract
When boiling or bubbling occurs in a liquid pool, droplets are ejected from the surface by bursting of bubbles or splashing. In function of their size, the droplets are partly carried away by a streaming gas and partly returned to the bubbling surface by gravity force. It is measured simultaneously the size and velocity of droplets at several distances from the bubbling surface. It is used a Phase-Doppler Anemometry (PDA: Particle Dynamic Analyzer) in order to measure simultaneously the size based upon the phase of the scattering light of first order refraction ( P=1) and the velocity droplets. It is utilized a log-normal distribution function in order to describe the high droplet-size polydispersity distribution.
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