Effects of curvature existence, adding of nanoparticles and changing the circular minichannel shape on behavior of two-phase laminar mixed convection of Ag/water nanofluid
In the present research, heat transfer behavior and Ag/water two-phase laminar nanofluid flow as cooling fluid in volume fraction of nanoparticles 0–6 % and Reynolds numbers of 200–500 in a tube with curvature angle of 270° are simulated utilizing finite volume method. 3-D simulations of laminar mix...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Alexandria Engineering Journal |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110016822007165 |
| _version_ | 1811162744177557504 |
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| author | Saeid Mir Azher M. Abed Omid Ali Akbari Anoushiravan Mohammadian Davood Toghraie Ali Marzban Sajad Mir Farnaz Montazerifar Reza Bemani Ghassan Fadhil Smaisim |
| author_facet | Saeid Mir Azher M. Abed Omid Ali Akbari Anoushiravan Mohammadian Davood Toghraie Ali Marzban Sajad Mir Farnaz Montazerifar Reza Bemani Ghassan Fadhil Smaisim |
| author_sort | Saeid Mir |
| collection | DOAJ |
| description | In the present research, heat transfer behavior and Ag/water two-phase laminar nanofluid flow as cooling fluid in volume fraction of nanoparticles 0–6 % and Reynolds numbers of 200–500 in a tube with curvature angle of 270° are simulated utilizing finite volume method. 3-D simulations of laminar mixed convection two-phase nanofluid flow considering Grashof numbers of 5,000, 50,000 and 100,000 are carried out numerically. The results of the present research indicate that adding solid nanoparticles causes periodic behavior with particular repeat length on the axial velocity profile and maximum and minimum values shift every 60°. Also, after the curvature angle of 30° because of fluid motion, centrifugal forces importance, fluid rotation, and hydrodynamic field, local friction factor increases considerably up to channel outlet. In all diagrams, the maximum friction factor is related to the Grashof number of 100,000, this value will have more significant augmentation by the increase of volume fraction. Due to better fluid mixing and increase of temperature line slop at Reynolds number of 500, heat transfer enhances at the regions of the bottom bend of the channel. Higher volume fractions of nanoparticles reinforce the heat transfer mechanism and heat absorption from the hot surface. In the regions where fluid is influenced by thermal boundary layer growth, entropy generation is augmented. This entropy generation is due to heat transfer. On the other hand, entropy generation is reduced in the regions where the effect of inlet fluid temperature is dominated. |
| first_indexed | 2024-04-10T06:35:15Z |
| format | Article |
| id | doaj.art-8d5cd61dd14d4ad797cbc38ec6d6335a |
| institution | Directory Open Access Journal |
| issn | 1110-0168 |
| language | English |
| last_indexed | 2024-04-10T06:35:15Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Alexandria Engineering Journal |
| spelling | doaj.art-8d5cd61dd14d4ad797cbc38ec6d6335a2023-03-01T04:30:52ZengElsevierAlexandria Engineering Journal1110-01682023-03-0166707730Effects of curvature existence, adding of nanoparticles and changing the circular minichannel shape on behavior of two-phase laminar mixed convection of Ag/water nanofluidSaeid Mir0Azher M. Abed1Omid Ali Akbari2Anoushiravan Mohammadian3Davood Toghraie4Ali Marzban5Sajad Mir6Farnaz Montazerifar7Reza Bemani8Ghassan Fadhil Smaisim9Department of Mechanical Engineering, Aligoudarz Branch, Islamic Azad University, Aligoudarz, IranAir Conditioning and Refrigeration Techniques Engineering Department, Al-Mustaqbal University College, Babylon 51001, IraqYoung Researchers and Elite Club, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, IranDepartment of Mechanical Engineering, Isfahan University of Technology, Isfahan 84156-83111, IranDepartment of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, Iran; Corresponding author.Department of Mechanical Engineering, Aligoudarz Branch, Islamic Azad University, Aligoudarz, IranDepartment of Mechanical Engineering, Aligoudarz Branch, Islamic Azad University, Aligoudarz, IranDepartment of Mechanical Engineering, University of Science and Culture, Tehran, IranDepartment of Mechanical Engineering, Bushehr Branch, Islamic Azad University, Bushehr, IranDepartment of Mechanical Engineering, Faculty of Engineering, University of Kufa, Iraq; Nanotechnology and Advanced Materials Research Unit (NAMRU), Faculty of Engineering, University of Kufa, IraqIn the present research, heat transfer behavior and Ag/water two-phase laminar nanofluid flow as cooling fluid in volume fraction of nanoparticles 0–6 % and Reynolds numbers of 200–500 in a tube with curvature angle of 270° are simulated utilizing finite volume method. 3-D simulations of laminar mixed convection two-phase nanofluid flow considering Grashof numbers of 5,000, 50,000 and 100,000 are carried out numerically. The results of the present research indicate that adding solid nanoparticles causes periodic behavior with particular repeat length on the axial velocity profile and maximum and minimum values shift every 60°. Also, after the curvature angle of 30° because of fluid motion, centrifugal forces importance, fluid rotation, and hydrodynamic field, local friction factor increases considerably up to channel outlet. In all diagrams, the maximum friction factor is related to the Grashof number of 100,000, this value will have more significant augmentation by the increase of volume fraction. Due to better fluid mixing and increase of temperature line slop at Reynolds number of 500, heat transfer enhances at the regions of the bottom bend of the channel. Higher volume fractions of nanoparticles reinforce the heat transfer mechanism and heat absorption from the hot surface. In the regions where fluid is influenced by thermal boundary layer growth, entropy generation is augmented. This entropy generation is due to heat transfer. On the other hand, entropy generation is reduced in the regions where the effect of inlet fluid temperature is dominated.http://www.sciencedirect.com/science/article/pii/S1110016822007165TubeMixed heat transferNumerical studyNanofluidEntropy |
| spellingShingle | Saeid Mir Azher M. Abed Omid Ali Akbari Anoushiravan Mohammadian Davood Toghraie Ali Marzban Sajad Mir Farnaz Montazerifar Reza Bemani Ghassan Fadhil Smaisim Effects of curvature existence, adding of nanoparticles and changing the circular minichannel shape on behavior of two-phase laminar mixed convection of Ag/water nanofluid Alexandria Engineering Journal Tube Mixed heat transfer Numerical study Nanofluid Entropy |
| title | Effects of curvature existence, adding of nanoparticles and changing the circular minichannel shape on behavior of two-phase laminar mixed convection of Ag/water nanofluid |
| title_full | Effects of curvature existence, adding of nanoparticles and changing the circular minichannel shape on behavior of two-phase laminar mixed convection of Ag/water nanofluid |
| title_fullStr | Effects of curvature existence, adding of nanoparticles and changing the circular minichannel shape on behavior of two-phase laminar mixed convection of Ag/water nanofluid |
| title_full_unstemmed | Effects of curvature existence, adding of nanoparticles and changing the circular minichannel shape on behavior of two-phase laminar mixed convection of Ag/water nanofluid |
| title_short | Effects of curvature existence, adding of nanoparticles and changing the circular minichannel shape on behavior of two-phase laminar mixed convection of Ag/water nanofluid |
| title_sort | effects of curvature existence adding of nanoparticles and changing the circular minichannel shape on behavior of two phase laminar mixed convection of ag water nanofluid |
| topic | Tube Mixed heat transfer Numerical study Nanofluid Entropy |
| url | http://www.sciencedirect.com/science/article/pii/S1110016822007165 |
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