ISSN Online: 2377-424X
International Heat Transfer Conference 3
INCIPIENCE, GROWTH, AND DETACHMENT OF BOIlING BUBBLES IN SATURATED WATER FROM ARTIFICIAL NUCLEATION SITES OF KNOWN GEOMETRY AND SIZE
Resumo
Artificial nucleation sites were drilled in a polished metal surface. The formation of boiling bubbles
was studied by electrically heating the surface in saturated distilled water and obtaining surface
temperature, heat flux, and photographic data. The surface temperature elevation above saturation required
to produce ebullition is given as a function of site radius and compared with three available analyses.
Data giving bubble growth as a function of site radius and surface temperature elevation is provided and
compared with theoretical growth relations. At bubble detachment the buoyancy and surface tension forces
are found to be in good agreement.