Mesure et prévision de la chute de pression dans les puits thermiques diphasiques à microcanaux.
Measurement and prediction of pressure drop in two-phase micro-channel heat sinks.
Auteurs : QU W., MUDAWAR I.
Type d'article : Article
Résumé
This study explored hydrodynamic instability and pressure drop in a water-cooled two-phase micro-channel heat sink. Two types of two-phase hydrodynamic instability were identified: severe pressure drop oscillation and mild parallel channel instability. It was shown that severe pressure drop oscillation, which can trigger premature critical heat flux, can be eliminated simply by throttling the flow upstream from the heat sink. Different methods for predicting two-phase pressure drop were assessed for suitability to micro-channel heat-sink design. A new correlation incorporating the effects of both channel size and coolant mass velocity is proposed; it shows better accuracy than prior correlations. The second method consists of a theoretical annular two-phase flow model which, aside from excellent predictive capability, possesses the unique attributes of providing a detailed description of the various transport processes occurring in the micro-channel, as well as fundamental appeal and broader application range than correlations.
Détails
- Titre original : Measurement and prediction of pressure drop in two-phase micro-channel heat sinks.
- Identifiant de la fiche : 2004-1614
- Langues : Anglais
- Source : International Journal of Heat and Mass Transfer - vol. 46 - n. 15
- Date d'édition : 07/2003
Liens
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Indexation
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Thèmes :
Transfert de masse;
Ecoulement diphasique - Mots-clés : Écoulement diphasique; Microcanal; Source de chaleur; Modélisation; Chute de pression
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State-of-the-art of two-phase flow and flow boi...
- Auteurs : THOME J. R., RIBATSKI G.
- Date : 12/2005
- Langues : Anglais
- Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 28 - n. 8
- Formats : PDF
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Two-phase pressure drops in the annular flow re...
- Auteurs : GARIMELLA S., AGARWAL A., COLEMAN J. W.
- Date : 17/08/2003
- Langues : Anglais
- Source : 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
- Formats : PDF
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Pressure drop and visualization of R134a two-ph...
- Auteurs : TU X., HRNJAK P. S.
- Date : 2003
- Langues : Anglais
- Source : ASHRAE Transactions. 2003 Winter Meeting, Chicago, Illinois. Volume 109, part 1 + CD-ROM.
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Modélisation de l'écoulement des fluides actifs...
- Auteurs : NIKITIN D. N.
- Date : 2004
- Langues : Russe
- Source : Holodil'na Tehnika i Tehnologiâ - n. 5
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Two-phase flow pattern, heat transfer, and pres...
- Auteurs : PETTERSEN J.
- Date : 2003
- Langues : Anglais
- Source : ASHRAE Transactions. 2003 Winter Meeting, Chicago, Illinois. Volume 109, part 1 + CD-ROM.
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