Augmentation of Heat Transfer in a Circular Channel with Inline and Staggered Baffles
This numerical investigation presents the effects of the position of baffles in the shape of a circle’s segment placed inside a circular channel to improve the thermal and flow performance of a solar air heater. Three different baffles’ positions with Reynolds number varying between 10,000 to 50,000...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-12-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/14/24/8593 |
| _version_ | 1827672643220799488 |
|---|---|
| author | Muneerah Al Nuwairan Basma Souayeh |
| author_facet | Muneerah Al Nuwairan Basma Souayeh |
| author_sort | Muneerah Al Nuwairan |
| collection | DOAJ |
| description | This numerical investigation presents the effects of the position of baffles in the shape of a circle’s segment placed inside a circular channel to improve the thermal and flow performance of a solar air heater. Three different baffles’ positions with Reynolds number varying between 10,000 to 50,000 were investigated computationally. The k-omega SST model was used for solving the governing equations. Air was taken as the working fluid. Three pitch ratios (Y = 3, 4, and 5) were considered, while the height of the baffles remained fixed. The result showed an enhancement in Nusselt number, friction factor, j-factor, and thermal performance factor. Staggered exit-length baffles showed maximum enhancement in heat transfer and pressure drop, while inline inlet-length baffles showed the least enhancement. For a pitch ratio of Y = 3.0, the enhancement in all parameters was the highest, while for Y = 5.0, the enhancement in all parameters was the least. The highest thermal performance factor of 1.6 was found for SEL at Y = 3.0. |
| first_indexed | 2024-03-10T04:12:10Z |
| format | Article |
| id | doaj.art-718142a362f44ec69c2dd7622e802147 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T04:12:10Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-718142a362f44ec69c2dd7622e8021472023-11-23T08:09:26ZengMDPI AGEnergies1996-10732021-12-011424859310.3390/en14248593Augmentation of Heat Transfer in a Circular Channel with Inline and Staggered BafflesMuneerah Al Nuwairan0Basma Souayeh1Department of Mathematics and Statistics, College of Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi ArabiaDepartment of Physics, College of Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi ArabiaThis numerical investigation presents the effects of the position of baffles in the shape of a circle’s segment placed inside a circular channel to improve the thermal and flow performance of a solar air heater. Three different baffles’ positions with Reynolds number varying between 10,000 to 50,000 were investigated computationally. The k-omega SST model was used for solving the governing equations. Air was taken as the working fluid. Three pitch ratios (Y = 3, 4, and 5) were considered, while the height of the baffles remained fixed. The result showed an enhancement in Nusselt number, friction factor, j-factor, and thermal performance factor. Staggered exit-length baffles showed maximum enhancement in heat transfer and pressure drop, while inline inlet-length baffles showed the least enhancement. For a pitch ratio of Y = 3.0, the enhancement in all parameters was the highest, while for Y = 5.0, the enhancement in all parameters was the least. The highest thermal performance factor of 1.6 was found for SEL at Y = 3.0.https://www.mdpi.com/1996-1073/14/24/8593heat transferCFDbafflesstaggeredj-factorthermal performance factor |
| spellingShingle | Muneerah Al Nuwairan Basma Souayeh Augmentation of Heat Transfer in a Circular Channel with Inline and Staggered Baffles Energies heat transfer CFD baffles staggered j-factor thermal performance factor |
| title | Augmentation of Heat Transfer in a Circular Channel with Inline and Staggered Baffles |
| title_full | Augmentation of Heat Transfer in a Circular Channel with Inline and Staggered Baffles |
| title_fullStr | Augmentation of Heat Transfer in a Circular Channel with Inline and Staggered Baffles |
| title_full_unstemmed | Augmentation of Heat Transfer in a Circular Channel with Inline and Staggered Baffles |
| title_short | Augmentation of Heat Transfer in a Circular Channel with Inline and Staggered Baffles |
| title_sort | augmentation of heat transfer in a circular channel with inline and staggered baffles |
| topic | heat transfer CFD baffles staggered j-factor thermal performance factor |
| url | https://www.mdpi.com/1996-1073/14/24/8593 |
| work_keys_str_mv | AT muneerahalnuwairan augmentationofheattransferinacircularchannelwithinlineandstaggeredbaffles AT basmasouayeh augmentationofheattransferinacircularchannelwithinlineandstaggeredbaffles |