Titre :	Effet des propriétés thermophysiques variables sur la convection mixte dans l’espace annulaire entre deux cylindres elliptique horizontaux
Type de document :	texte imprimé
Auteurs :	Khalil Zerari, Auteur ; M. Afrid, Directeur de thèse
Editeur :	constantine [Algérie] : Université Constantine 1
Année de publication :	2014
Importance :	198 f.
Format :	30 cm.
Note générale :	2 copies imprimées disponibles
Langues :	Français (fre)
Catégories :	Français - Anglais Physique
Tags :	Mixed convection  Temperature dependent properties  Elliptic confocal cylinders  Finite volume method  Convection mixte  Propriétés dépendent de la température  cylindres elliptiques confocaux  la méthode des volumes finis  الحمل الحراري المختلط  الخواص الفيزيائية متعلقة بدرجة الحرارة  أسطوانات متحدة البؤر إهليجية الشكل  طريقة الحجوم المنتهية
Index. décimale :	530 Physique
Résumé :	This study presents a numerical simulation of the three dimensional laminar mixed convection between two elliptical horizontal cylinders using temperature dependent physical properties. The inner cylinder is uniformly heated whereas the outer cylinder is adiabatic. The flow and thermal fields are modeled by the continuity, momentum and energy equations with appropriate initial and boundary conditions using an elliptical coordinate system. The model equations are numerically solved by a finite volume numerical method with second order accurate spatiotemporal discretizations. For the considered geometric, dynamic and thermal controlling parameters, it is found that the realistic consideration of the mixed convection with variable physical properties gives physically sound flows and thermal fields that are qualitatively and quantitatively different from those of forced convection with temperature dependent properties and those of mixed convection with constant properties; the obtained Nusselt number is also higher in this case. The heat transfer enhancement obtained by considering natural convection within mixed convection with temperature dependent physical properties increases with the increased Grashof number which is proportional to the heat flux imposed at the surface of the inner cylinder.
Diplôme :	Doctorat en sciences
En ligne :	../theses/physique/ZER6483.pdf
Format de la ressource électronique :	pdf
Permalink :	index.php?lvl=notice_display&id=9542

Effet des propriétés thermophysiques variables sur la convection mixte dans l’espace annulaire entre deux cylindres elliptique horizontaux [texte imprimé] / Khalil Zerari, Auteur ; M. Afrid, Directeur de thèse . - constantine [Algérie] : Université Constantine 1, 2014 . - 198 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)

Catégories :	Français - Anglais Physique
Tags :	Mixed convection  Temperature dependent properties  Elliptic confocal cylinders  Finite volume method  Convection mixte  Propriétés dépendent de la température  cylindres elliptiques confocaux  la méthode des volumes finis  الحمل الحراري المختلط  الخواص الفيزيائية متعلقة بدرجة الحرارة  أسطوانات متحدة البؤر إهليجية الشكل  طريقة الحجوم المنتهية
Index. décimale :	530 Physique
Résumé :	This study presents a numerical simulation of the three dimensional laminar mixed convection between two elliptical horizontal cylinders using temperature dependent physical properties. The inner cylinder is uniformly heated whereas the outer cylinder is adiabatic. The flow and thermal fields are modeled by the continuity, momentum and energy equations with appropriate initial and boundary conditions using an elliptical coordinate system. The model equations are numerically solved by a finite volume numerical method with second order accurate spatiotemporal discretizations. For the considered geometric, dynamic and thermal controlling parameters, it is found that the realistic consideration of the mixed convection with variable physical properties gives physically sound flows and thermal fields that are qualitatively and quantitatively different from those of forced convection with temperature dependent properties and those of mixed convection with constant properties; the obtained Nusselt number is also higher in this case. The heat transfer enhancement obtained by considering natural convection within mixed convection with temperature dependent physical properties increases with the increased Grashof number which is proportional to the heat flux imposed at the surface of the inner cylinder.
Diplôme :	Doctorat en sciences
En ligne :	../theses/physique/ZER6483.pdf
Format de la ressource électronique :	pdf
Permalink :	index.php?lvl=notice_display&id=9542