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Heat transfer from composite material extended surfaces heat sink
Author
Source
The Iraqi Journal for Mechanical and Materials Engineering
Issue
Vol. 8, Issue 1 (30 Apr. 2008), pp.43-58, 16 p.
Publisher
University of Babylon College of Engineering
Publication Date
2008-04-30
Country of Publication
Iraq
No. of Pages
16
Main Subjects
Abstract AR
لقد تم دراسة انتقال الحرارة من السطوح الممتدة باستعمال الطرق العددية (Numerical Solution) و قد تم استعمال طريقة العناصر المحددة (Finite Element) ذات العناصر الرباعية الشكل (Rectangular Elements) باستعمال طريقة كليركن (Galerkin Method).
لقد تم دراسة تاثير نسبة الموصلية (Conductivity Ratio) (النسبة بين الموصلية الحرارية للمادة الأساس و الموصلية الحرارية للمادة المغطاة) على كل من فاعلية (Effectiveness) و كفاءة (Efficiency) للسطوح المزعنفة المغطاة و كذلك تأثير هذه النسبة على كل من انتقال الحرارة و الزمن اللازم للوصول إلى حالة الاستقرار.
و كذلك لقد تم دراسة وجود مصدر للحرارة المتولدة (Heat Generation) خلال المادة الأساس و تاثيرها على توزيع درجات الحرارة.
و يمكن ملاحظة أن الزيادة في نسبة التوصيل (من أقل من واحد إلى أعلى من واحد) يؤدي إلى تقليل الزمن اللازم للوصول إلى حالة الاستقرار و كذلك زيادة الفاعلية و الكفاءة للسطوح الممتدة.
Abstract EN
This research deals with the theoretical and experimental study of free convection heat transfer between horizontal concentric pipes of constant inner and outer cylinders temperature, respectively and (Ti>To).
The finite elements method was used to solve the numerical relations of momentum and energy equations.
The numerical solution has been included the calculation of the temperature and velocity values between the cylinders by using ANSYS program (finite element analysis structural system).
Different models of concentric double pipes were created and tested with different diametral ratios.
Nusselt number was obtained for a range of temperature difference (ΔT = Ti-To) of (6.01-120.42C0).
The results also showed that the average heat transfer coefficient values at the inner and outer radii respectively increased with the increasing of Rayleigh number and the ratio of outer to inner radius.
The theoretical and experimental results were compared with some of researches that presented in the literature to achieve the verification of the results obtained from the numerical analysis and experimental modeling for the heat transfer between concentric double pipes.
The results are in good agreement.
American Psychological Association (APA)
Jasim, Ali Mir Ali. 2008. Heat transfer from composite material extended surfaces heat sink. The Iraqi Journal for Mechanical and Materials Engineering،Vol. 8, no. 1, pp.43-58.
https://search.emarefa.net/detail/BIM-242290
Modern Language Association (MLA)
Jasim, Ali Mir Ali. Heat transfer from composite material extended surfaces heat sink. The Iraqi Journal for Mechanical and Materials Engineering Vol. 8, no. 1 (2008), pp.43-58.
https://search.emarefa.net/detail/BIM-242290
American Medical Association (AMA)
Jasim, Ali Mir Ali. Heat transfer from composite material extended surfaces heat sink. The Iraqi Journal for Mechanical and Materials Engineering. 2008. Vol. 8, no. 1, pp.43-58.
https://search.emarefa.net/detail/BIM-242290
Data Type
Journal Articles
Language
English
Notes
Includes appendices : p. 52-58
Record ID
BIM-242290