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Partager le résultat de cette recherche Interroger des sources externesÉtude Numérique de la Convection Mixte dans un Canal Horizontal Contenant des Ailettes / Moussa Khentoul
Titre : Étude Numérique de la Convection Mixte dans un Canal Horizontal Contenant des Ailettes Type de document : texte imprimé Auteurs : Moussa Khentoul, Auteur ; R. Bessaih, Auteur Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2016 Importance : 131 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Génie MécaniqueTags : Convection mixte Canal horizontal Refroidissement nanofluide Ailettes Mixed convection horizontal channel Cooling nanofluid fins الحمل المزدوج قناة أفقية تبريد مائع النانوي الّزعانف Index. décimale : 620 Génie Mécanique Résumé : Heat transfer is very important for good design and reliable operation of a system.
Reliability and system performance are highly dependent on the operating temperature,
in particular, in electronic equipment. Several cooling methods have been proposed in
order to improve the heat transfer. These techniques include two: which consists in
grafting blades offering a greater contact surface with the environment; and which
consists of using nanofluids comprising metallic particles or carbon nanotubes. The
latter is currently present the best solution.
In the first part of the thesis, a numerical study of 2D laminar mixed convection in
a horizontal channel with three fins nanofluid has been carried out made. The influence
of Reynolds and Richardson numbers and concentration of nanoparticles (Al2O3, Cu, Ag
and TiO2) dispersed in a base fluid (water), on the flow and thermal fields is presented.
A computer code in Fortran, based on finite volume method was used to simulate 2D
flow with heat transfer. The results indicate that the addition of nanoparticles in pure
water can improve the cooling performance, in particular, low Richardson number. The
influence of the solid volume fraction on increasing the heat transfer is more sensitive to
higher values of Reynolds number. Although, the addition of nanofluids (TiO2 and
Al
2O3) also increases heat transfer, their influence is not important for Cu-Ag-water and
water.
The second part is to find an optimal geometry for good cooling. Numerical
calculations were carried out using the software ""FLUENT 6.3"" to simulate 3D laminar
mixed convection flow in a channel containing fins with nanofluid. The effects of
Reynolds number, height, and distance between the fins are presented and discussed.
Diplôme : Doctorat En ligne : ../theses/gmecanique/KHE6947.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10324 Étude Numérique de la Convection Mixte dans un Canal Horizontal Contenant des Ailettes [texte imprimé] / Moussa Khentoul, Auteur ; R. Bessaih, Auteur . - جامعة الإخوة منتوري قسنطينة, 2016 . - 131 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Génie MécaniqueTags : Convection mixte Canal horizontal Refroidissement nanofluide Ailettes Mixed convection horizontal channel Cooling nanofluid fins الحمل المزدوج قناة أفقية تبريد مائع النانوي الّزعانف Index. décimale : 620 Génie Mécanique Résumé : Heat transfer is very important for good design and reliable operation of a system.
Reliability and system performance are highly dependent on the operating temperature,
in particular, in electronic equipment. Several cooling methods have been proposed in
order to improve the heat transfer. These techniques include two: which consists in
grafting blades offering a greater contact surface with the environment; and which
consists of using nanofluids comprising metallic particles or carbon nanotubes. The
latter is currently present the best solution.
In the first part of the thesis, a numerical study of 2D laminar mixed convection in
a horizontal channel with three fins nanofluid has been carried out made. The influence
of Reynolds and Richardson numbers and concentration of nanoparticles (Al2O3, Cu, Ag
and TiO2) dispersed in a base fluid (water), on the flow and thermal fields is presented.
A computer code in Fortran, based on finite volume method was used to simulate 2D
flow with heat transfer. The results indicate that the addition of nanoparticles in pure
water can improve the cooling performance, in particular, low Richardson number. The
influence of the solid volume fraction on increasing the heat transfer is more sensitive to
higher values of Reynolds number. Although, the addition of nanofluids (TiO2 and
Al
2O3) also increases heat transfer, their influence is not important for Cu-Ag-water and
water.
The second part is to find an optimal geometry for good cooling. Numerical
calculations were carried out using the software ""FLUENT 6.3"" to simulate 3D laminar
mixed convection flow in a channel containing fins with nanofluid. The effects of
Reynolds number, height, and distance between the fins are presented and discussed.
Diplôme : Doctorat En ligne : ../theses/gmecanique/KHE6947.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10324 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité KHE/6947 KHE/6947 Thèse Bibliothèque principale Thèses Disponible
Titre : Etude des transferts de chaleur et de masse dans une machine frigorifique à adsorption solaire Type de document : texte imprimé Auteurs : Billel Mebarki, Auteur ; Rabah Gomri, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 138 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Génie ClimatiqueTags : Adsorption Froid Gel de silice/eau Force motrice linéaire (LDF) Modélisation COP Cooling Silica gel/water Linear driving Force Model (LDF) امتزاز تبريد جال السيليس الماء Index. décimale : 626 Génie Climatique Résumé : The aim of this thesis is to study the influence of the constructive parameters of an adsorption bed on the performance of a two-bed adsorption chiller and on the temperature distribution of the adsorbent, the rate of the adsorbate and the pressure in the adsorption bed.
In the context of the choice of the adsorbent-adsorbate couple, a very important step in optimizing the performance of an adsorption refrigeration machine, a static model of an adsorption cooling machine was developed. A FORTRAN computation code corresponding to this model has been established allowing the best choice of the adsorbent-adsorbate couple.
The performance of two adsorbent bed silica gel-water adsorption chiller and the influences of its adsorbent bed dimensions, the velocity of heat exchange fluid and the adsorbent particle diameter on the transient distributions of the solid phase temperature, adsorbate concentration and the pressure are numerically examined in this study.
A transient two-dimensional local thermal non-equilibrium model that takes into account both internal and external mass transfer resistances is developed to simulate the adsorption chiller considered herein. The internal and external mass transfers are predicted by the linear driving force (LDF) model and Darcy’s equation, respectively.
The results of our simulations provide useful guidelines for the design of this type of adsorption chillers.
Diplôme : Doctorat en sciences En ligne : ../theses/gclim/MEB7004.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10384 Etude des transferts de chaleur et de masse dans une machine frigorifique à adsorption solaire [texte imprimé] / Billel Mebarki, Auteur ; Rabah Gomri, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2017 . - 138 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Génie ClimatiqueTags : Adsorption Froid Gel de silice/eau Force motrice linéaire (LDF) Modélisation COP Cooling Silica gel/water Linear driving Force Model (LDF) امتزاز تبريد جال السيليس الماء Index. décimale : 626 Génie Climatique Résumé : The aim of this thesis is to study the influence of the constructive parameters of an adsorption bed on the performance of a two-bed adsorption chiller and on the temperature distribution of the adsorbent, the rate of the adsorbate and the pressure in the adsorption bed.
In the context of the choice of the adsorbent-adsorbate couple, a very important step in optimizing the performance of an adsorption refrigeration machine, a static model of an adsorption cooling machine was developed. A FORTRAN computation code corresponding to this model has been established allowing the best choice of the adsorbent-adsorbate couple.
The performance of two adsorbent bed silica gel-water adsorption chiller and the influences of its adsorbent bed dimensions, the velocity of heat exchange fluid and the adsorbent particle diameter on the transient distributions of the solid phase temperature, adsorbate concentration and the pressure are numerically examined in this study.
A transient two-dimensional local thermal non-equilibrium model that takes into account both internal and external mass transfer resistances is developed to simulate the adsorption chiller considered herein. The internal and external mass transfers are predicted by the linear driving force (LDF) model and Darcy’s equation, respectively.
The results of our simulations provide useful guidelines for the design of this type of adsorption chillers.
Diplôme : Doctorat en sciences En ligne : ../theses/gclim/MEB7004.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10384 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité MEB/7004 MEB/7004 Thèse Bibliothèque principale Thèses Disponible
