عنوان المقالة:الحمل الحراري لاسطوانه دائريه في دهليز مربع Numerical investigation of natural convection phenomena in a uniformly heated circular cylinder immersed in square enclosure filled with air at different vertical locations
الاستاذ الدكتور احمد كاظم حسين | Prof.Dr. Ahmed Kadhim Hussein | 5736
نوع النشر
مجلة علمية
المؤلفون بالعربي
سلام هادي حسين , احمد كاظم حسين
المؤلفون بالإنجليزي
Salam Hadi Hussain, Ahmed Kadhim Hussein
الملخص العربي
الحمل الحراري لاسطوانه دائريه في دهليز مربع
الملخص الانجليزي
In this model, a numerical study of two dimensional steady natural convection is performed for a uniform heat source applied on the inner circular cylinder in a square air (Pr=0.7) filled enclosure in which all boundaries are assumed to be isothermal (at a constant low temperature). The developed mathematical model is governed by the coupled equations of continuity, momentum and energy and is solved by finite volume method. The effects of vertical cylinder locations and Rayleigh numbers on fluid flow and heat transfer performance are investigated. Rayleigh number is varied from 103 to 106 and the location of the inner cylinder is changed vertically along the centerline of the enclosure from −0.25 L to 0.25 L upward and downward, respectively. It is found that at small Rayleigh numbers does not have much influence on the flow field while at high Rayleigh numbers have considerable effect on the flow pattern. In addition, the numerical solutions yield a two cellular flow field between the inner cylinder and the enclosure. Also, the total average Nusselt number behaves nonlinearly as a function of locations. Results are presented in terms of the streamlines, isotherms, local and average Nusselt numbers. Detailed results of the numerical has been compared with literature ones, and it gives a reliable agreement
تاريخ النشر
06/08/2010
الناشر
دار نشر السفير العالميه
رقم المجلد
37
رقم العدد
4
ISSN/ISBN
0735-1933
رابط DOI
j.icheatmasstransfer.2010.05.016
الصفحات
1115–1126
رابط الملف
تحميل (81 مرات التحميل)
الكلمات المفتاحية
natural convection
رجوع