An experimental study on the effect of lobe swirl device and its transition parts on thermal performance using Graphene-CuO/water nanohybrid
Enhancing heat transfer efficiency is a key focus in thermal applications. Smooth channels often suffer from poor fluid mixing, limiting their performance. Swirl flow techniques have been introduced to improve heat exchanger efficiency by altering flow direction and inducing turbulence. However, int...
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| Language: | English |
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Elsevier
2025-04-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25001856 |
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| author | Farag A. Diabis Abd Rahim Abu Talib Norkhairunnisa Mazlan Eris Elianddy Supeni |
| author_facet | Farag A. Diabis Abd Rahim Abu Talib Norkhairunnisa Mazlan Eris Elianddy Supeni |
| author_sort | Farag A. Diabis |
| collection | DOAJ |
| description | Enhancing heat transfer efficiency is a key focus in thermal applications. Smooth channels often suffer from poor fluid mixing, limiting their performance. Swirl flow techniques have been introduced to improve heat exchanger efficiency by altering flow direction and inducing turbulence. However, integrating nanofluids with swirl techniques presents challenges such as increased pressure loss and nanoparticle sedimentation. The four-lobed swirl generator is a promising solution, delivering high swirl intensity with manageable pressure loss. This study explores the impact of GO-CuO/water hybrid nanofluid and Reynolds numbers on the thermal performance of a four-lobed swirl generator. The system parameters include a twisted angle (θ = 360°), β-transition type, transition multiplier (n = 0.5 mm), and a variable helix (t = 1). The hybrid nanofluid, synthesized with a 20 % GO to 80 % CuO ratio, has volume concentrations of 0.15%–0.75 % wt., with Reynolds numbers from 15,000 to 35,000. Results indicate a significant heat transfer enhancement (1.26–1.72 times) with a moderate friction factor increase (1.27–1.53). The highest thermal performance (1.511) occurs at 0.75 % nanofluid concentration and Re = 25,000. This study confirms the four-lobed swirl generator's effectiveness in improving heat exchanger efficiency while maintaining an acceptable pressure drop. |
| format | Article |
| id | doaj-art-a8cb7cad815a45a8a5995b3e582da5a1 |
| institution | DOAJ |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-a8cb7cad815a45a8a5995b3e582da5a12025-08-20T03:05:39ZengElsevierCase Studies in Thermal Engineering2214-157X2025-04-016810592510.1016/j.csite.2025.105925An experimental study on the effect of lobe swirl device and its transition parts on thermal performance using Graphene-CuO/water nanohybridFarag A. Diabis0Abd Rahim Abu Talib1Norkhairunnisa Mazlan2Eris Elianddy Supeni3Aerodynamic, Heat Transfer and Propulsion Group, Department of Aerospace Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, 43400, Selangor, MalaysiaAerodynamic, Heat Transfer and Propulsion Group, Department of Aerospace Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, 43400, Selangor, Malaysia; Aerospace Malaysia Research Centre, Faculty of Engineering, Universiti Putra Malaysia, Serdang, 43400, Selangor, Malaysia; Universiti Kuala Lumpur Malaysian Institute of Aviation Technology (UniKL MIAT), Lot 2891 Jalan Jenderam Hulu, 43800, Dengkil, Selangor, Malaysia; Corresponding author. Aerodynamic, Heat Transfer and Propulsion Group, Department of Aerospace Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, 43400, Selangor, Malaysia.Aerodynamic, Heat Transfer and Propulsion Group, Department of Aerospace Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, 43400, Selangor, Malaysia; Aerospace Malaysia Research Centre, Faculty of Engineering, Universiti Putra Malaysia, Serdang, 43400, Selangor, MalaysiaDepartment of Mechanical and Manufacturing Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, 43400, Selangor, MalaysiaEnhancing heat transfer efficiency is a key focus in thermal applications. Smooth channels often suffer from poor fluid mixing, limiting their performance. Swirl flow techniques have been introduced to improve heat exchanger efficiency by altering flow direction and inducing turbulence. However, integrating nanofluids with swirl techniques presents challenges such as increased pressure loss and nanoparticle sedimentation. The four-lobed swirl generator is a promising solution, delivering high swirl intensity with manageable pressure loss. This study explores the impact of GO-CuO/water hybrid nanofluid and Reynolds numbers on the thermal performance of a four-lobed swirl generator. The system parameters include a twisted angle (θ = 360°), β-transition type, transition multiplier (n = 0.5 mm), and a variable helix (t = 1). The hybrid nanofluid, synthesized with a 20 % GO to 80 % CuO ratio, has volume concentrations of 0.15%–0.75 % wt., with Reynolds numbers from 15,000 to 35,000. Results indicate a significant heat transfer enhancement (1.26–1.72 times) with a moderate friction factor increase (1.27–1.53). The highest thermal performance (1.511) occurs at 0.75 % nanofluid concentration and Re = 25,000. This study confirms the four-lobed swirl generator's effectiveness in improving heat exchanger efficiency while maintaining an acceptable pressure drop.http://www.sciencedirect.com/science/article/pii/S2214157X25001856Lobed swirl deviceTransition partsGO-CuO/water nanohybridNusselt numberFriction factor |
| spellingShingle | Farag A. Diabis Abd Rahim Abu Talib Norkhairunnisa Mazlan Eris Elianddy Supeni An experimental study on the effect of lobe swirl device and its transition parts on thermal performance using Graphene-CuO/water nanohybrid Case Studies in Thermal Engineering Lobed swirl device Transition parts GO-CuO/water nanohybrid Nusselt number Friction factor |
| title | An experimental study on the effect of lobe swirl device and its transition parts on thermal performance using Graphene-CuO/water nanohybrid |
| title_full | An experimental study on the effect of lobe swirl device and its transition parts on thermal performance using Graphene-CuO/water nanohybrid |
| title_fullStr | An experimental study on the effect of lobe swirl device and its transition parts on thermal performance using Graphene-CuO/water nanohybrid |
| title_full_unstemmed | An experimental study on the effect of lobe swirl device and its transition parts on thermal performance using Graphene-CuO/water nanohybrid |
| title_short | An experimental study on the effect of lobe swirl device and its transition parts on thermal performance using Graphene-CuO/water nanohybrid |
| title_sort | experimental study on the effect of lobe swirl device and its transition parts on thermal performance using graphene cuo water nanohybrid |
| topic | Lobed swirl device Transition parts GO-CuO/water nanohybrid Nusselt number Friction factor |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X25001856 |
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