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Partager le résultat de cette recherche Interroger des sources externesGénération d’entropie due au refroidissement par convection naturelle d’un nanofluide / Abd el malik Bouchoucha
Titre : Génération d’entropie due au refroidissement par convection naturelle d’un nanofluide Type de document : texte imprimé Auteurs : Abd el malik Bouchoucha, Auteur ; Rachid Bessaih, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 159 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Tags : Nanofluide Génération d’entropie Convection naturelle Cavité Nanofluid Entropy generation Natural convection Cavity ????? ?????? ????? ? ???????? ????? ??????? ??????? ???? Index. décimale : 620 Génie Mécanique Résumé : Venous thromboembolism (VTE) is a multifactorial disease in which the genetic
component is important.Many genetic risk factors have been identified for causing VTE.
Most of them affect the function of natural anticoagulant pathways, particularly the prote
Diplôme : Doctorat En ligne : ../theses/gmecanique/BOU7046.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10553 Génération d’entropie due au refroidissement par convection naturelle d’un nanofluide [texte imprimé] / Abd el malik Bouchoucha, Auteur ; Rachid Bessaih, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2017 . - 159 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Tags : Nanofluide Génération d’entropie Convection naturelle Cavité Nanofluid Entropy generation Natural convection Cavity ????? ?????? ????? ? ???????? ????? ??????? ??????? ???? Index. décimale : 620 Génie Mécanique Résumé : Venous thromboembolism (VTE) is a multifactorial disease in which the genetic
component is important.Many genetic risk factors have been identified for causing VTE.
Most of them affect the function of natural anticoagulant pathways, particularly the prote
Diplôme : Doctorat En ligne : ../theses/gmecanique/BOU7046.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10553 Exemplaires
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Titre : Etude de la convection mixte dans des cavités. Type de document : texte imprimé Auteurs : Ilhem Zeghbid, Auteur ; R. Bessaih, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 172 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Tags : Mixed convection Cavities Entropy generation Nanofluid Convection mixte Cavités Génération d’entropie Nanofluide ???? ????? ????? ??????? ????? ?????? Index. décimale : 620 Génie Mécanique Résumé : The aim of this work is to study numerically the laminar mixed convection and
entropy generation in cavities. The calculations were performed for water (Cu, Ag)
metallic nanofluids and water-(AlO3, TiO2) metal oxides. The fluids are supposed
incompressible and Newtonian. The equations governing the flow and heat transfer have
been solved using the finite volume method. A house code in FORTRAN has been
developed to calculate the flow and temperature fields, the Nusselt number, and the
entropy generation. The effects of Rayleigh and Reynolds numbers , the volume fraction
of the nanofluid, the nanofluid type, and the position of the heat sources on the flow and
thermal fields, the average Nusselt number, entropy generation, and the Bejan number
are studied in detail. The results show that the use of nanofluids improves heat transfer
and reduces the entropy generation. Finally, a three-dimensional numerical study of
laminar forced convection in a cubic cavity filled with different nanofluids is presented.
In this study, the Ansys-Fluent 14 software was used to solve the equations of the
problem in questionDiplôme : Doctorat en sciences En ligne : ../theses/gmecanique/ZEG7096.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10508 Etude de la convection mixte dans des cavités. [texte imprimé] / Ilhem Zeghbid, Auteur ; R. Bessaih, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2017 . - 172 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Tags : Mixed convection Cavities Entropy generation Nanofluid Convection mixte Cavités Génération d’entropie Nanofluide ???? ????? ????? ??????? ????? ?????? Index. décimale : 620 Génie Mécanique Résumé : The aim of this work is to study numerically the laminar mixed convection and
entropy generation in cavities. The calculations were performed for water (Cu, Ag)
metallic nanofluids and water-(AlO3, TiO2) metal oxides. The fluids are supposed
incompressible and Newtonian. The equations governing the flow and heat transfer have
been solved using the finite volume method. A house code in FORTRAN has been
developed to calculate the flow and temperature fields, the Nusselt number, and the
entropy generation. The effects of Rayleigh and Reynolds numbers , the volume fraction
of the nanofluid, the nanofluid type, and the position of the heat sources on the flow and
thermal fields, the average Nusselt number, entropy generation, and the Bejan number
are studied in detail. The results show that the use of nanofluids improves heat transfer
and reduces the entropy generation. Finally, a three-dimensional numerical study of
laminar forced convection in a cubic cavity filled with different nanofluids is presented.
In this study, the Ansys-Fluent 14 software was used to solve the equations of the
problem in questionDiplôme : Doctorat en sciences En ligne : ../theses/gmecanique/ZEG7096.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10508 Exemplaires
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Titre : Etude numérique des transferts thermiques convectifs avec nano-fluides. Type de document : texte imprimé Auteurs : Esma Belahmadi, Auteur ; Rachid Bessaih, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 148 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Tags : Transfert de chaleur convectif Nanofluide Génération d’entropie Convective heat transfer Nanofluid Entropy generation ??? ????? ????? ??????? ??????????? (Nanofluide) ????? ????????? Index. décimale : 620 Génie Mécanique Résumé : In this work, we present the study of convective heat transfers with nanofluid and entropy generation inside three selected configurations. Two computational codes (AnsysFluent 14 and house-Fortran) were used to solve the partial differential equations describing natural convection and mixed laminar flows. Numerical results obtained by these codes were validated with those found in the literature, and a good agreement was obtained. The study presented in this thesis is divided into three parts.
The first part of this study is devoted to two-dimensional flow in a vertical channel with parallel plates traversed by a Cu-water nanofluid. The effects of Reynolds and Grashof numbers, and the nanofluid solid volume fraction on heat transfer and entropy generation are examined in detail. The results show that increasing the nanoparticle volume fraction and dimensionless numbers (Re, Gr) improves the heat transfer rate and decreases the
entropy generation in the channel.
The second part presents the axisymmetric flow of an Al2O3-water nanofluid between two vertical coaxial cylinders. The effects of Rayleigh, Hartmann numbers, inclination angle and solid volume fraction of nanoparticles on heat transfer and entropy generation are studied in detail. Results reveal that the heat transfer and entropy generation rates depend on the intensity and orientation of the magnetic field. In addition,
in all cases, the average Nusselt number and the total entropy generation increase by increasing the Rayleigh number and the volume fraction of nanoparticles.
The third part is based on heat transfer, stready state, in a horizontal cylindrical duct, traversed by a three-dimensional flow of a nanofluid subjected to a heat flux to the wall. The effects of Richardson and Hartmann numbers, solid volume fraction of the nanofluid, and the direction of the magnetic field on heat transfer and entropy generation are examined in detail. The results indicate that the heat transfer and entropy generation
rates depend on the intensity and direction of the magnetic field. In addition, the increase in the number of Richardson and the volume fraction of nanoparticles increases heat transfer and entropy generation. Finally, the application of a radial magnetic field promotes a better convective heat exchange and minimizes the entropy generation.
Diplôme : Doctorat en sciences En ligne : ../theses/gmecanique/BEL7268.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10886 Etude numérique des transferts thermiques convectifs avec nano-fluides. [texte imprimé] / Esma Belahmadi, Auteur ; Rachid Bessaih, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2018 . - 148 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Tags : Transfert de chaleur convectif Nanofluide Génération d’entropie Convective heat transfer Nanofluid Entropy generation ??? ????? ????? ??????? ??????????? (Nanofluide) ????? ????????? Index. décimale : 620 Génie Mécanique Résumé : In this work, we present the study of convective heat transfers with nanofluid and entropy generation inside three selected configurations. Two computational codes (AnsysFluent 14 and house-Fortran) were used to solve the partial differential equations describing natural convection and mixed laminar flows. Numerical results obtained by these codes were validated with those found in the literature, and a good agreement was obtained. The study presented in this thesis is divided into three parts.
The first part of this study is devoted to two-dimensional flow in a vertical channel with parallel plates traversed by a Cu-water nanofluid. The effects of Reynolds and Grashof numbers, and the nanofluid solid volume fraction on heat transfer and entropy generation are examined in detail. The results show that increasing the nanoparticle volume fraction and dimensionless numbers (Re, Gr) improves the heat transfer rate and decreases the
entropy generation in the channel.
The second part presents the axisymmetric flow of an Al2O3-water nanofluid between two vertical coaxial cylinders. The effects of Rayleigh, Hartmann numbers, inclination angle and solid volume fraction of nanoparticles on heat transfer and entropy generation are studied in detail. Results reveal that the heat transfer and entropy generation rates depend on the intensity and orientation of the magnetic field. In addition,
in all cases, the average Nusselt number and the total entropy generation increase by increasing the Rayleigh number and the volume fraction of nanoparticles.
The third part is based on heat transfer, stready state, in a horizontal cylindrical duct, traversed by a three-dimensional flow of a nanofluid subjected to a heat flux to the wall. The effects of Richardson and Hartmann numbers, solid volume fraction of the nanofluid, and the direction of the magnetic field on heat transfer and entropy generation are examined in detail. The results indicate that the heat transfer and entropy generation
rates depend on the intensity and direction of the magnetic field. In addition, the increase in the number of Richardson and the volume fraction of nanoparticles increases heat transfer and entropy generation. Finally, the application of a radial magnetic field promotes a better convective heat exchange and minimizes the entropy generation.
Diplôme : Doctorat en sciences En ligne : ../theses/gmecanique/BEL7268.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10886 Exemplaires
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