Enhanced boiling heat transfer in porous layers with application to electronic component cooling

Konstantinou, ND; Stubos, AK; Statharas, JC; Kanellopoulos, NK; Papaioannou, ACh

dc.contributor.author	Konstantinou, ND	en
dc.contributor.author	Stubos, AK	en
dc.contributor.author	Statharas, JC	en
dc.contributor.author	Kanellopoulos, NK	en
dc.contributor.author	Papaioannou, ACh	en
dc.date.accessioned	2014-03-01T01:12:51Z
dc.date.available	2014-03-01T01:12:51Z
dc.date.issued	1997	en
dc.identifier.issn	1065-5131	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12265
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0030708484&partnerID=40&md5=31d064f9996a3c51156c5e85f3e7cbdd	en
dc.subject	Boiling	en
dc.subject	Electronic components cooling	en
dc.subject	Enhanced heat transfer	en
dc.subject	Numerical simulation	en
dc.subject	Porous media	en
dc.subject	Two-phase flow	en
dc.subject.classification	Thermodynamics	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.other	Boiling liquids	en
dc.subject.other	Computer simulation	en
dc.subject.other	Electronic equipment	en
dc.subject.other	Heat flux	en
dc.subject.other	Mechanical permeability	en
dc.subject.other	Phase transitions	en
dc.subject.other	Porosity	en
dc.subject.other	Porous materials	en
dc.subject.other	Thermal conductivity of solids	en
dc.subject.other	Two phase flow	en
dc.subject.other	Boiling heat transfer enhancement	en
dc.subject.other	Electronic component cooling	en
dc.subject.other	Heat transfer	en
dc.title	Enhanced boiling heat transfer in porous layers with application to electronic component cooling	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1997	en
heal.abstract	The present contribution deals with a continuous approach to modeling steady state evaporative heat transfer and vapor/liquid counterflow in porous media, in an attempt o identify the mechanisms responsible for the observed heat transfer enhancement during boiling of liquid coolants in porous layers. A 1-D computer code is developed solving the mass, momentum and energy conservation equations for a bottom and/or volumetrically heated, capillary porous medium. The limitations of such a macroscopic study are recognized and relate mainly to its inability to provide an insight of the micromechanics aspects at the pore level. Nevertheless, the macroscopic calculations are employed to highlight the effects of the relevant parameters (fluid properties, medium permeability and porosity, thermal conductivity of solid matrix, layer thickness) and identify the relative significance of the different mechanisms (capillarity, counter-flow, phase change). A simplified analytical approach is taken to describe the steady state thermohydraulic behaviour of a liquid saturated porous medium. This offers a fast, approximate method for predicting the limiting dryout heat flux in the porous layer. Qualitative agreement is obtained when the theoretical reproduction of the experimental boiling curves is attempted. Based on the understanding gained, investigations are underway to suggest geometric and thermal modifications of the system which may contribute to a significant increase of the heat flux removed in the case of electronic components cooling.	en
heal.publisher	GORDON BREACH SCI PUBL LTD	en
heal.journalName	Journal of Enhanced Heat Transfer	en
dc.identifier.isi	ISI:A1997XW01000002	en
dc.identifier.volume	4	en
dc.identifier.issue	3	en
dc.identifier.spage	175	en
dc.identifier.epage	186	en