Circulation and coalescence within a vaporizing emulsified fuel droplet

Conference · Tue Jan 01 04:00:00 EST 1980

OSTI ID:5129540

Baer, M. R.; Sheffield, S. A.; Denison, G. J.

A droplet of emulsified fuel (hexadecane, with 30% dispersed water and 2% surfactant) was supported by a vapor film between the droplet and a polished hot surface. Overlighting with a laser was used. During vaporization of approx. 2000 ..mu..m droplet, rapid internal circulation caused coalescence of the dispersed water droplets. Convective velocities are 0.2 to 0.5 m/s. During circulation, these droplets move directly along the fuel surface and are not preferentially distilled from the droplet. Coalescence of the water continues until all the water is in a single lump, and then this lump falls to the base of the droplet. (DLC)

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5129540
• Report Number(s): SAND-80-1916C; CONF-801118-1
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALKANES
COALESCENCE
COLLOIDS
CONVECTION
DISPERSIONS
DROPLETS
ELECTROMAGNETIC RADIATION
EMULSIONS
EVAPORATION
FUELS
HEXADECANE
HYDROCARBONS
HYDROGEN COMPOUNDS
LASER RADIATION
LIQUID FUELS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PARTICLES
PHASE TRANSFORMATIONS
PHOTOGRAPHY
RADIATIONS
SURFACTANTS
WATER