Pool entrainment phenomenon: Measurement of size and velocity distributions of droplets at several distances above the bubbling surface

• Published in: International Communications in Heat and Mass Transfer; (United States) Vol. 18; no. 2; pp. 207 - 218
• Main Authors: Ramirez de Santiago, Mario, Marvillet, Christophe
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY Elsevier Ltd 1991; Elsevier
• Subjects: ANEMOMETERS; Applied sciences; BOILING; BUBBLES; DISTRIBUTION FUNCTIONS; DROPLETS; drops; Energy; ENERGY TRANSFER; Energy. Thermal use of fuels; ENGINEERING; ENTRAINMENT; Exact sciences and technology; Fission nuclear power plants; FLUIDS; FUNCTIONS; HEAT TRANSFER; Installations for energy generation and conversion: thermal and electrical energy; LIGHT SCATTERING; LIQUIDS; MEASURING INSTRUMENTS; MEASURING METHODS; PARTICLES; PHASE TRANSFORMATIONS; POOL BOILING; SCATTERING 420400 > Engineering > Heat Transfer & Fluid Flow; SIZE; two phase flow; VELOCITY; velocity measurement; Two phase flow; Size; Dragging; Doppler laser anemometer; Gas liquid flow; Velocity distribution; Experimental study; Droplet; Nuclear reactor
• ISSN: 0735-1933; 1879-0178
• DOI: 10.1016/0735-1933(91)90045-6

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.