Laminar Mixed Convection in the Entrance Region of Horizontal and Inclined Semicircular Ducts
Author
Source
Advances in Mechanical Engineering
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-04-16
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Laminar mixed convection in the entrance region of horizontal and inclined semicircular ducts has been investigated.
The governing momentum and energy equations were solved numerically using a marching technique with finite control volume approach following the SIMPLER algorithm.
Results were obtained for thermal boundary condition of uniform heat input axially and uniform wall temperature circumferentially, incorporating Pr = 7, Re = 500, inclination angles (α=0° and 20°), and a wide range of Grashof numbers.
These results include velocity and temperature distributions at different axial locations as well as axial distribution of local Nusselt number and local wall friction factor.
It was found that Nusselt number is close to the forced convection values near the entrance region, then decreases to minimum value as the distance from the entrance increases, and then rises due to the effect of free convection before reaching a constant value (fully developed).
As Grashof number increases Nusselt number and wall friction factor increase in both developing and fully developed regions for horizontal and inclined ducts.
A comparison with the experimental data in the thermal entrance region was also conducted and the comparison was satisfactory.
American Psychological Association (APA)
El Hasadi, Yousef M. F.. 2013. Laminar Mixed Convection in the Entrance Region of Horizontal and Inclined Semicircular Ducts. Advances in Mechanical Engineering،Vol. 2013, no. 2013, pp.1-11.
https://search.emarefa.net/detail/BIM-474635
Modern Language Association (MLA)
El Hasadi, Yousef M. F.. Laminar Mixed Convection in the Entrance Region of Horizontal and Inclined Semicircular Ducts. Advances in Mechanical Engineering No. 2013 (2013), pp.1-11.
https://search.emarefa.net/detail/BIM-474635
American Medical Association (AMA)
El Hasadi, Yousef M. F.. Laminar Mixed Convection in the Entrance Region of Horizontal and Inclined Semicircular Ducts. Advances in Mechanical Engineering. 2013. Vol. 2013, no. 2013, pp.1-11.
https://search.emarefa.net/detail/BIM-474635
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-474635