![](/images/graphics-bg.png)
Improvement of free convection from three horizontal finned cylinders fixed between two walls
Other Title(s)
تحسين انتقال الحرارة الحر من ثلاث أسطوانات أفقية مزعنفة مثبتة بين جدارين
Joint Authors
Rahman, Hanin Hasan
Abd Allah, Hasan Karim
Source
Wasit Journal of Engineering Sciences
Issue
Vol. 6, Issue 2 (31 Aug. 2018), pp.99-114, 16 p.
Publisher
Wasit University College of Engineering
Publication Date
2018-08-31
Country of Publication
Iraq
No. of Pages
16
Main Subjects
Abstract EN
Improvement of free convection heat transfer from three finned cylinders arranged at a triangle shape fixed between two walls has been investigated in this study.
Three mild steel finned cylinders fixed between two walls from Pyrex glass have been used as a test rig.
It has been changed the spacing between the cylinders (X/D=1,2,3 & S/D=2,4,6) and the head orientation of a triangle to the top under constant heat flux values (38, 254, 660, 1268) W/m2 and compare with case of three finned cylinders arranged in vertical array in line fixed between two wall.
The experiments are carried for Rayleigh number (Ra) from (15x103 to 14 x104 ) and Prandtl number from (0.706-0.714 ).
The results indicated an increase in Nu with increasing Ra for all cylinders.
Furthermore,hx and Nu increased proportionally with the increasing of cylinder spacings for all heat fluxes.
Also the experimental results show the case of triangle arrangement is improvement the heat transfer more than case of vertical arrangement.
Heat transfer dimensionless correlating equation is also proposed.
Nomeclature: Ax: surface area(m2), T∞: surrounding temperature(k), D: the outer diameter of fin (m), Kf: the thermal conductivity for air at film temperature(W/m.k), hx: Local convection heat transfer(W/m2.k), g: Gravitational acceleration(m/s2), I: Electric current (Amp), Nu: Nusselt number, Pr: Prandtl number
American Psychological Association (APA)
Abd Allah, Hasan Karim& Rahman, Hanin Hasan. 2018. Improvement of free convection from three horizontal finned cylinders fixed between two walls. Wasit Journal of Engineering Sciences،Vol. 6, no. 2, pp.99-114.
https://search.emarefa.net/detail/BIM-920421
Modern Language Association (MLA)
Abd Allah, Hasan Karim& Rahman, Hanin Hasan. Improvement of free convection from three horizontal finned cylinders fixed between two walls. Wasit Journal of Engineering Sciences Vol. 6, no. 2 (2018), pp.99-114.
https://search.emarefa.net/detail/BIM-920421
American Medical Association (AMA)
Abd Allah, Hasan Karim& Rahman, Hanin Hasan. Improvement of free convection from three horizontal finned cylinders fixed between two walls. Wasit Journal of Engineering Sciences. 2018. Vol. 6, no. 2, pp.99-114.
https://search.emarefa.net/detail/BIM-920421
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 97-98
Record ID
BIM-920421