Numerical study of heat transfer enhancement by inserting different size balls inside tube
Joint Authors
Khaddur, Dhamya S.
Anid, Haydar L.
Source
Journal of Engineering and Sustainable Development
Issue
Vol. 25, Issue 6 (30 Jun. 2021), pp.1-11, 11 p.
Publisher
al-Mustansyriah University College of Engineering
Publication Date
2021-06-30
Country of Publication
Iraq
No. of Pages
11
Main Subjects
Topics
- Heat transfer
- Fluid mechanics
- Thermal properties
- Pressure
- Side effects
- Heat exchangers
- Reynolds number
- Turbulent flow
Abstract EN
In this paper, the challenge is to increasing of the heat exchanger performance by placing different size balls inside the tubes.
the development of previous studies to enhance relatively bad case of heat transfer where the inserting (a large ball and then a small ball) to collide the water molecules in the ball and generate turbulent flow (Reynolds number range from 50, 000 to 350, 000) and thus increase the thermal performance due to collision of particles with the inner casing of the tube and reduce the stagnation near the wall.
The usefulness of small ball, after the big ball, is Reduce of gets wake flow.
A simulation was made when changing the diameter ratio of big to small ball (Dr = 3, 4, 5).
Also, the distance between the big ball and the small ball was changed (X = 2, 3, 5) mm.
It was concluded that the best ball diameter ratio and best Distance is (Dr= D_b/D_sb = 5), (X = 3 mm), respectively.
The pressure drop acts as a side effect of enhancement.
Therefore, the method of equal pumping was adopted.
The average thermal performance factor (TPF=1.178) of tube with insert the balls enhanced by 17.8% at (x=3mm) and (Dr=5) when compared with smooth In this paper, the challenge is to increasing of the heat exchanger performance by placing different size balls inside the tubes.
the development of previous studies to enhance relatively bad case of heat transfer where the inserting (a large ball and then a small ball) to collide the water molecules in the ball and generate turbulent flow (Reynolds number range from 50, 000 to 350, 000) and thus increase the thermal performance due to collision of particles with the inner casing of the tube and reduce the stagnation near the wall.
The usefulness of small ball, after the big ball, is Reduce of gets wake flow.
A simulation was made when changing the diameter ratio of big to small ball (Dr = 3, 4, 5).
Also, the distance between the big ball and the small ball was changed (X = 2, 3, 5) mm.
It was concluded that the best ball diameter ratio and best Distance is (Dr= D_b/D_sb = 5), (X = 3 mm), respectively.
The pressure drop acts as a side effect of enhancement.
Therefore, the method of equal pumping was adopted.
The average thermal performance factor (TPF=1.178) of tube with insert the balls enhanced by 17.8% at (x=3mm) and (Dr=5) when compared with smooth tube.
American Psychological Association (APA)
Anid, Haydar L.& Khaddur, Dhamya S.. 2021. Numerical study of heat transfer enhancement by inserting different size balls inside tube. Journal of Engineering and Sustainable Development،Vol. 25, no. 6, pp.1-11.
https://search.emarefa.net/detail/BIM-1368938
Modern Language Association (MLA)
Anid, Haydar L.& Khaddur, Dhamya S.. Numerical study of heat transfer enhancement by inserting different size balls inside tube. Journal of Engineering and Sustainable Development Vol. 25, no. 6 (2021), pp.1-11.
https://search.emarefa.net/detail/BIM-1368938
American Medical Association (AMA)
Anid, Haydar L.& Khaddur, Dhamya S.. Numerical study of heat transfer enhancement by inserting different size balls inside tube. Journal of Engineering and Sustainable Development. 2021. Vol. 25, no. 6, pp.1-11.
https://search.emarefa.net/detail/BIM-1368938
Data Type
Journal Articles
Language
English
Notes
-
Record ID
BIM-1368938