LrgpV1, Main, Exploration, bibRecord, 000B98

Numerical study of evaporation in a vertical annulus heated at the inner wall

Identifieur interne : 000B98 ( Main/Exploration ); précédent : 000B97; suivant : 000B99

Numerical study of evaporation in a vertical annulus heated at the inner wall

Auteurs : R. Ben Radhia [Tunisie] ; J. P. Corriou [France] ; S. Harmand [France] ; S. Ben Jabrallah [Tunisie]

Source :

International journal of thermal sciences [ 1290-0729 ] ; 2011.

RBID : Pascal:11-0459437

Descripteurs français

Pascal (Inist)
- Convection mixte, Eau, Film tombant, Cylindre vertical, Espace annulaire, Méthode volume fini, Modélisation, Simulation numérique, Evaporation, Transfert chaleur masse, Nombre Nusselt, Cylindre coaxial, Refroidissement évaporation.
Wicri :
- topic : Eau.

English descriptors

KwdEn :
- Annular space, Coaxial cylinders, Combined convection, Evaporation, Evaporative cooling, Falling film, Finite volume method, Heat mass transfer, Modeling, Numerical simulation, Nusselt number, Vertical cylinder, Water.
mix :
- AMINAR MIXED CONVECTION, Annulus, BEHAVIOR, CAVITY, CHANNEL, DISTILLATION CELL, Evaporation, FALLING FILM, INCLINED PLATE, LIQUID-FILM, Liquid film, MASS-TRANSFER, Mixed convection, WATER.

Abstract

Mixed convection during evaporation of a water falling film in a vertical concentric annulus was studied numerically. The water thin film falls on the inner tube and is subjected to a constant heat flux density, whereas the outer cylinder is assumed to be insulated and dry. An imposed air flow circulates within the gap between the two concentric tubes. The objective of this work is to understand the evaporation phenomenon in order to improve the average evaporated mass flux density and heat and mass transfer. Conservative equations governing the gas phase are solved numerically using the finite volume method. In the liquid phase, a method based on local heat and mass balances on each level is used. Thus, the following liquid film parameters, feed water mass flow, feed temperature and heat flux density, are taken into account. The obtained results are analyzed to emphasize and evaluate the influence of the previous operating parameters and the annulus curvature on the effective evaporation surface and on the mass flux density of evaporated water.

Url:

https://hal.archives-ouvertes.fr/hal-00777378

Affiliations:

Le document en format XML

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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Annular space</term>
<term>Coaxial cylinders</term>
<term>Combined convection</term>
<term>Evaporation</term>
<term>Evaporative cooling</term>
<term>Falling film</term>
<term>Finite volume method</term>
<term>Heat mass transfer</term>
<term>Modeling</term>
<term>Numerical simulation</term>
<term>Nusselt number</term>
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<term>Espace annulaire</term>
<term>Méthode volume fini</term>
<term>Modélisation</term>
<term>Simulation numérique</term>
<term>Evaporation</term>
<term>Transfert chaleur masse</term>
<term>Nombre Nusselt</term>
<term>Cylindre coaxial</term>
<term>Refroidissement évaporation</term>
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<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Eau</term>
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<term>Annulus</term>
<term>BEHAVIOR</term>
<term>CAVITY</term>
<term>CHANNEL</term>
<term>DISTILLATION CELL</term>
<term>Evaporation</term>
<term>FALLING FILM</term>
<term>INCLINED PLATE</term>
<term>LIQUID-FILM</term>
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<term>MASS-TRANSFER</term>
<term>Mixed convection</term>
<term>WATER</term>
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<front><div type="abstract" xml:lang="en">Mixed convection during evaporation of a water falling film in a vertical concentric annulus was studied numerically. The water thin film falls on the inner tube and is subjected to a constant heat flux density, whereas the outer cylinder is assumed to be insulated and dry. An imposed air flow circulates within the gap between the two concentric tubes. The objective of this work is to understand the evaporation phenomenon in order to improve the average evaporated mass flux density and heat and mass transfer. Conservative equations governing the gas phase are solved numerically using the finite volume method. In the liquid phase, a method based on local heat and mass balances on each level is used. Thus, the following liquid film parameters, feed water mass flow, feed temperature and heat flux density, are taken into account. The obtained results are analyzed to emphasize and evaluate the influence of the previous operating parameters and the annulus curvature on the effective evaporation surface and on the mass flux density of evaporated water.</div>
</front>
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Numerical study of evaporation in a vertical annulus heated at the inner wall

Numerical study of evaporation in a vertical annulus heated at the inner wall

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

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