Direct contact heat transfer between immiscible liquids in stratified flow with simultaneous interfacial boiling

✍ Scribed by Samuel Sideman; Israel Uliss

• Publisher: Elsevier Science
• Year: 1972
• Tongue: English
• Weight: 976 KB
• Volume: 27
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(72)80101-5

✦ Synopsis

Heat transfer from a hot water layer to a heavier Freon 113 layer was studied in a cell in which each layer could be independently stirred to yield parallel or counter-flow. In the absence of boiling, the transfer rates can either be determined analytically, using the boundary layer model or correlated semi-empirically by applying the surface renewal concept.

Interfacial bubble growth and disengagement greatly enhance the transfer rates in stratitied flow. Assuming that stirring affects the disengaging bubble size, the surface renewal concept leads to a relationship between the heat flux, the cumulative specific power input and the temperature driving force. The interaction between these factors is determined quantitatively and the generality and applicability of the relationship to stratified as well as dispersed systems undergoing phase change are discussed. tpresently, Visiting Professor,