Heat transfer enhancement by utilizing Al2O3-Water nanofluid in a coiled agitated vessel
This study aims to investigate the heat transfer process of Al₂O₃ water-nanofluid using an agitated vessel with coils. The experiment was conducted using three volumetric concentrations of nanofluid (0.15, 0.25, and 0.35 vol%). The effects of propeller speeds ranging from 2 to 12 revolutions per sec...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-02-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X24017714 |
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| author | Abdulrazzaq Abdzaid Hussein Ahmed Chead Auda Ansam F. Showard H.I. Dawood |
| author_facet | Abdulrazzaq Abdzaid Hussein Ahmed Chead Auda Ansam F. Showard H.I. Dawood |
| author_sort | Abdulrazzaq Abdzaid Hussein |
| collection | DOAJ |
| description | This study aims to investigate the heat transfer process of Al₂O₃ water-nanofluid using an agitated vessel with coils. The experiment was conducted using three volumetric concentrations of nanofluid (0.15, 0.25, and 0.35 vol%). The effects of propeller speeds ranging from 2 to 12 revolutions per second (r.p.s) and temperature from 30 °C to 80 °C were tested with cooling water flow rates (1.4 and 1.8 l/min). The Nusselt number was evaluated in relation to the nanofluid's volumetric concentration, viscosity, Prandtl, and Reynolds number. The results showed a significant increase in the heat transfer coefficient with an improvement of 74.5 % compared to the base water when the nanofluid concentration was increased to 0.35 vol%. This enhancement is attributed to the increased of thermal conductivity of the nanofluid due to the addition of Al₂O₃ nanoparticles. Besides, smaller Al2O₃ nanoparticle sizes ranging from 12.3 to 17.5 nm resulted in improved stability and suspension efficiency. Propeller speed at 12 r.p.s led to an increase in the heat transfer coefficient by 11.8 %. Moreover, when the temperature reached 80 °C and the cooling water flow rate was reduced to 1.4 l/min, the results showed an increase in the heat transfer coefficient by 19.3 % and 9.8 %, respectively. |
| format | Article |
| id | doaj-art-d9e4e7dcd83e4b42890929719eb3d8ed |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-d9e4e7dcd83e4b42890929719eb3d8ed2025-02-02T05:27:19ZengElsevierCase Studies in Thermal Engineering2214-157X2025-02-0166105740Heat transfer enhancement by utilizing Al2O3-Water nanofluid in a coiled agitated vesselAbdulrazzaq Abdzaid Hussein0Ahmed Chead Auda1Ansam F. Showard2H.I. Dawood3Department of Chemical Engineering, College of Engineering, University of AL-Qadisiyah, AL-Qadisiyah, IraqDepartment of Chemical Engineering, College of Engineering, University of AL-Qadisiyah, AL-Qadisiyah, IraqRadiology Techniques Departament, College of Health and Medical Techniques, Al-mustaqbal University, 51001, Babylon, IraqDepartment of Chemical Engineering, College of Engineering, University of AL-Qadisiyah, AL-Qadisiyah, Iraq; Corresponding author.This study aims to investigate the heat transfer process of Al₂O₃ water-nanofluid using an agitated vessel with coils. The experiment was conducted using three volumetric concentrations of nanofluid (0.15, 0.25, and 0.35 vol%). The effects of propeller speeds ranging from 2 to 12 revolutions per second (r.p.s) and temperature from 30 °C to 80 °C were tested with cooling water flow rates (1.4 and 1.8 l/min). The Nusselt number was evaluated in relation to the nanofluid's volumetric concentration, viscosity, Prandtl, and Reynolds number. The results showed a significant increase in the heat transfer coefficient with an improvement of 74.5 % compared to the base water when the nanofluid concentration was increased to 0.35 vol%. This enhancement is attributed to the increased of thermal conductivity of the nanofluid due to the addition of Al₂O₃ nanoparticles. Besides, smaller Al2O₃ nanoparticle sizes ranging from 12.3 to 17.5 nm resulted in improved stability and suspension efficiency. Propeller speed at 12 r.p.s led to an increase in the heat transfer coefficient by 11.8 %. Moreover, when the temperature reached 80 °C and the cooling water flow rate was reduced to 1.4 l/min, the results showed an increase in the heat transfer coefficient by 19.3 % and 9.8 %, respectively.http://www.sciencedirect.com/science/article/pii/S2214157X24017714(Al2O3) water-nano fluidPropellerNusselt numberVolume concentrationAgitated vessel |
| spellingShingle | Abdulrazzaq Abdzaid Hussein Ahmed Chead Auda Ansam F. Showard H.I. Dawood Heat transfer enhancement by utilizing Al2O3-Water nanofluid in a coiled agitated vessel Case Studies in Thermal Engineering (Al2O3) water-nano fluid Propeller Nusselt number Volume concentration Agitated vessel |
| title | Heat transfer enhancement by utilizing Al2O3-Water nanofluid in a coiled agitated vessel |
| title_full | Heat transfer enhancement by utilizing Al2O3-Water nanofluid in a coiled agitated vessel |
| title_fullStr | Heat transfer enhancement by utilizing Al2O3-Water nanofluid in a coiled agitated vessel |
| title_full_unstemmed | Heat transfer enhancement by utilizing Al2O3-Water nanofluid in a coiled agitated vessel |
| title_short | Heat transfer enhancement by utilizing Al2O3-Water nanofluid in a coiled agitated vessel |
| title_sort | heat transfer enhancement by utilizing al2o3 water nanofluid in a coiled agitated vessel |
| topic | (Al2O3) water-nano fluid Propeller Nusselt number Volume concentration Agitated vessel |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X24017714 |
| work_keys_str_mv | AT abdulrazzaqabdzaidhussein heattransferenhancementbyutilizingal2o3waternanofluidinacoiledagitatedvessel AT ahmedcheadauda heattransferenhancementbyutilizingal2o3waternanofluidinacoiledagitatedvessel AT ansamfshoward heattransferenhancementbyutilizingal2o3waternanofluidinacoiledagitatedvessel AT hidawood heattransferenhancementbyutilizingal2o3waternanofluidinacoiledagitatedvessel |