LrgpV1, PascalFrancis, Checkpoint, bibRecord, 000157

Thermodynamic Analysis of Capillary Flows in the Presence of Hydrodynamic Slip

Identifieur interne : 000157 ( PascalFrancis/Checkpoint ); précédent : 000156; suivant : 000158

Thermodynamic Analysis of Capillary Flows in the Presence of Hydrodynamic Slip

Auteurs : A. Laouir [Algérie] ; Daniel Tondeur [France]

Source :

AIChE journal [ 0001-1541 ] ; 2011.

RBID : Pascal:11-0350806

Descripteurs français

Pascal (Inist)
- Analyse thermodynamique, Ecoulement capillaire, Hydrodynamique, Ecoulement liquide, Interface liquide solide, Entropie, Effet surface, Modèle mathématique, Pression capillaire, Cavitation, Ecoulement diphasique, Perte charge, Microfluidique, Milieu poreux.

English descriptors

KwdEn :
- Capillary flow, Capillary pressure, Cavitation, Entropy, Hydrodynamics, Liquid flow, Liquid solid interface, Mathematical model, Microfluidics, Porous medium, Pressure drop, Surface effect, Thermodynamic analysis, Two phase flow.

Abstract

A thermodynamic description of liquid flows in capillaries with hydrodynamic slip at the solid-liquid interface is given. Slip over the capillary wall brings into play surface interactions and therefore involves interfacial energy and entropy. Energy and entropy balance equations are written so as to take into account surface effects. The two relations constitute a general mathematical model that allows readily analyzing various situations and to explore the behavior of such thermodynamic process. The main result derived concerns the existence of a capillary pressure of slip; slip occurrence leads to a pressure decrease in the flow and might cause cavitation. The variation in magnitude of the slip effect, viewed as a thermodynamic transformation, may take place irreversibly. Slip irreversibility and the probable occurrence of a two-phase flow regime are possible factors that may cause additional pressure drop.

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Le document en format XML

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<front><div type="abstract" xml:lang="en">A thermodynamic description of liquid flows in capillaries with hydrodynamic slip at the solid-liquid interface is given. Slip over the capillary wall brings into play surface interactions and therefore involves interfacial energy and entropy. Energy and entropy balance equations are written so as to take into account surface effects. The two relations constitute a general mathematical model that allows readily analyzing various situations and to explore the behavior of such thermodynamic process. The main result derived concerns the existence of a capillary pressure of slip; slip occurrence leads to a pressure decrease in the flow and might cause cavitation. The variation in magnitude of the slip effect, viewed as a thermodynamic transformation, may take place irreversibly. Slip irreversibility and the probable occurrence of a two-phase flow regime are possible factors that may cause additional pressure drop.</div>
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Thermodynamic Analysis of Capillary Flows in the Presence of Hydrodynamic Slip

Thermodynamic Analysis of Capillary Flows in the Presence of Hydrodynamic Slip

Source :

Descripteurs français

English descriptors

Abstract

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Le document en format XML

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