Multiobjective optimization of Vortex Generators for heat transfer enhancement in turbulent flows
Convective heat transfer can be enhanced by streamwise vortices and coherent flow structures produced downstream Vortex Generators (VGs). The thermal performance depends on the VG shape which controls the intensity and topology of the vortices. Thus, VG shape optimization is a major challenge in des...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-05-01
|
| Series: | International Journal of Thermofluids |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666202724000752 |
| _version_ | 1797248311426547712 |
|---|---|
| author | H. Karkaba T. Dbouk C. Habchi S. Russeil T. Lemenand D. Bougeard |
| author_facet | H. Karkaba T. Dbouk C. Habchi S. Russeil T. Lemenand D. Bougeard |
| author_sort | H. Karkaba |
| collection | DOAJ |
| description | Convective heat transfer can be enhanced by streamwise vortices and coherent flow structures produced downstream Vortex Generators (VGs). The thermal performance depends on the VG shape which controls the intensity and topology of the vortices. Thus, VG shape optimization is a major challenge in designing sustainable and efficient heat exchangers. In the present study, a multi-objective optimization is performed through large space exploration design to find optimal VG shapes that adapt to different flow regimes. Simulations are carried out in parallel plate turbulent flow for three different Reynolds numbers; Re1=4600,Re2=9920, and Re3=30050. The present numerical results are first validated against numerical and experimental data from the open literature. Then, and for the first time, seven design parameters are investigated, based on VG shape dimensions. The new optimized VG show a thermal enhancement factor between 11 and 35%, relative to a smooth channel case, and between 3 and 14%, relative to different VG shapes from the recent open literature. The present results are analyzed in details by focusing on the physics of the flow structure and its correlation to the convective heat transfer enhancement using local criteria for flow visualization and vortex intensity quantification. |
| first_indexed | 2024-04-24T20:12:34Z |
| format | Article |
| id | doaj.art-ebb3a2fea29d44a9b25d9fbb97ad599b |
| institution | Directory Open Access Journal |
| issn | 2666-2027 |
| language | English |
| last_indexed | 2024-04-24T20:12:34Z |
| publishDate | 2024-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Thermofluids |
| spelling | doaj.art-ebb3a2fea29d44a9b25d9fbb97ad599b2024-03-23T06:25:58ZengElsevierInternational Journal of Thermofluids2666-20272024-05-0122100633Multiobjective optimization of Vortex Generators for heat transfer enhancement in turbulent flowsH. Karkaba0T. Dbouk1C. Habchi2S. Russeil3T. Lemenand4D. Bougeard5IMT Nord Europe, Institut Mines-Télécom, Univ. Lille, Centre for Energy and Environment, F-59000 Lille, France; Corresponding author.CORIA, UMR 6614, CNRS, Normandy Univ., UNIROUEN, 76000 Rouen, FranceMultiphysics Interaction Lab (MiLab), Los Angeles, CA 90703, USA; IMSIA UMR CNRS-EDF-CEA-ENSTA 9219, Institut Polytechnique de Paris, 91120 Palaiseau, FranceIMT Nord Europe, Institut Mines-Télécom, Univ. Lille, Centre for Energy and Environment, F-59000 Lille, FranceLARIS EA 7315, Polytech Angers, Université d’Angers, 49000, Angers, FranceIMT Nord Europe, Institut Mines-Télécom, Univ. Lille, Centre for Energy and Environment, F-59000 Lille, FranceConvective heat transfer can be enhanced by streamwise vortices and coherent flow structures produced downstream Vortex Generators (VGs). The thermal performance depends on the VG shape which controls the intensity and topology of the vortices. Thus, VG shape optimization is a major challenge in designing sustainable and efficient heat exchangers. In the present study, a multi-objective optimization is performed through large space exploration design to find optimal VG shapes that adapt to different flow regimes. Simulations are carried out in parallel plate turbulent flow for three different Reynolds numbers; Re1=4600,Re2=9920, and Re3=30050. The present numerical results are first validated against numerical and experimental data from the open literature. Then, and for the first time, seven design parameters are investigated, based on VG shape dimensions. The new optimized VG show a thermal enhancement factor between 11 and 35%, relative to a smooth channel case, and between 3 and 14%, relative to different VG shapes from the recent open literature. The present results are analyzed in details by focusing on the physics of the flow structure and its correlation to the convective heat transfer enhancement using local criteria for flow visualization and vortex intensity quantification.http://www.sciencedirect.com/science/article/pii/S2666202724000752Multi-functional heat exchangersVortex GeneratorTurbulenceShape optimizationForced convection |
| spellingShingle | H. Karkaba T. Dbouk C. Habchi S. Russeil T. Lemenand D. Bougeard Multiobjective optimization of Vortex Generators for heat transfer enhancement in turbulent flows International Journal of Thermofluids Multi-functional heat exchangers Vortex Generator Turbulence Shape optimization Forced convection |
| title | Multiobjective optimization of Vortex Generators for heat transfer enhancement in turbulent flows |
| title_full | Multiobjective optimization of Vortex Generators for heat transfer enhancement in turbulent flows |
| title_fullStr | Multiobjective optimization of Vortex Generators for heat transfer enhancement in turbulent flows |
| title_full_unstemmed | Multiobjective optimization of Vortex Generators for heat transfer enhancement in turbulent flows |
| title_short | Multiobjective optimization of Vortex Generators for heat transfer enhancement in turbulent flows |
| title_sort | multiobjective optimization of vortex generators for heat transfer enhancement in turbulent flows |
| topic | Multi-functional heat exchangers Vortex Generator Turbulence Shape optimization Forced convection |
| url | http://www.sciencedirect.com/science/article/pii/S2666202724000752 |
| work_keys_str_mv | AT hkarkaba multiobjectiveoptimizationofvortexgeneratorsforheattransferenhancementinturbulentflows AT tdbouk multiobjectiveoptimizationofvortexgeneratorsforheattransferenhancementinturbulentflows AT chabchi multiobjectiveoptimizationofvortexgeneratorsforheattransferenhancementinturbulentflows AT srusseil multiobjectiveoptimizationofvortexgeneratorsforheattransferenhancementinturbulentflows AT tlemenand multiobjectiveoptimizationofvortexgeneratorsforheattransferenhancementinturbulentflows AT dbougeard multiobjectiveoptimizationofvortexgeneratorsforheattransferenhancementinturbulentflows |