Influence of surface conditions in nucleate boiling--the concept of bubble flux density

Journal Article · Wed Nov 01 04:00:00 EST 1978 · J. Heat Transfer; (United States)

DOI:https://doi.org/10.1115/1.3450866· OSTI ID:6512951

Shoukri, M; Judd, R L

A study of the influence of surface conditions in nucleate pool boiling is presented. The surface conditions are represented by the number and distribution of the active nucleation sites as well as the size and size distribution of the cavities that constitute the nucleation sites. The heat transfer rate during nucleate boiling is shown to be influenced by the surface condition through its effect on the number and distribution of the active nucleation sites as well as the frequency of bubble departure from each of these different size cavities. The concept of bubble flux density, which is a function of both the active site density and frequency of bubble departure, is introduced. A method of evaluating the bubble flux density is proposed and a uniform correlation between the boiling heat flux and the bubble flux density is found to exist for a particular solid-liquid combination irrespective of the surface finish within the region of isolated bubbles.

• Research Organization: Research Engineer Ontario Hydro Research Division, Toronto, Ontario, Canada
• OSTI ID: 6512951
• Journal Information: J. Heat Transfer; (United States), Journal Name: J. Heat Transfer; (United States) Vol. 100:4; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
BOILING
BUBBLE GROWTH
CAVITATION
ENERGY TRANSFER
HEAT TRANSFER
NUCLEATE BOILING
NUCLEATION
PHASE TRANSFORMATIONS
POOL BOILING
SUBCOOLED BOILING
SURFACE PROPERTIES
SURFACE TENSION