An explanation for the augmentation of heat transfer during boiling in capillary structures

Autor:	J. Mitrovic, S.V. Konev
Rok vydání:	1986
Předmět:	Fluid Flow and Transfer Processes Superheating Phase transition Materials science Plane (geometry) Capillary action Mechanical Engineering Boiling Heat transfer Boiling process Thermodynamics Condensed Matter Physics Nucleate boiling
Zdroj:	International Journal of Heat and Mass Transfer. 29:91-94
ISSN:	0017-9310
DOI:	10.1016/0017-9310(86)90037-2
Popis:	The heat transfer in pool boiling on surfaces with capillary structures is much better than on plane surfaces. This fact has been observed by many researchers but a reliable physical explanation of the heat transfer process is still missing. In this paper an attempt is made to explain the boiling process in capillary structures. Our consideration is based on a study of the equilibrium of vapour bubbles in capillaries. It could be shown that the liquid superheat for bubbles in capillaries can be considerably reduced in comparison to the superheat needed for the equilibrium of the same bubbles in the liquid with a plane vapour-liquid interface. As a consequence the driving temperature difference with boiling in capillary structures decreases, and therefore the heat transfer increases.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e0d633a4e18f0036814e70635e153cae https://doi.org/10.1016/0017-9310(86)90037-2 Zobrazit plný text záznamu