Thermohydraulic performance study of the effect of winglet inserts and a corrugated wall in a rectangular channel
This numerical study investigates the enhancement of heat transfer and pressure drop characteristics in rectangular channels with transverse corrugations and longitudinal winglet vortex generators. Numerical simulations cover a range of Reynolds numbers (Re) (5000–20000) using channels with uniform...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X23010134 |
| _version_ | 1797422581996847104 |
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| author | Khamis Musdif Their Tareq hamad abed Kafel Azeez Marwa Alaa Mohsin |
| author_facet | Khamis Musdif Their Tareq hamad abed Kafel Azeez Marwa Alaa Mohsin |
| author_sort | Khamis Musdif Their |
| collection | DOAJ |
| description | This numerical study investigates the enhancement of heat transfer and pressure drop characteristics in rectangular channels with transverse corrugations and longitudinal winglet vortex generators. Numerical simulations cover a range of Reynolds numbers (Re) (5000–20000) using channels with uniform wall heat flux and fixed wavelength. The study evaluates the influence of geometrical parameters (corrugated channel amplitude and winglet length) on flow and temperature characteristics, average Nusselt number (Nu), and pressure drop. Corrugated channels alone create stationary transverse vortices that impede heat transfer. However, integrating winglet vortex generators introduces beneficial longitudinal vortices, disrupting stationary vortices, perturbing the thermal boundary layer, enhancing near-wall turbulence, and improving fluid mixing and heat transfer compared to smooth and corrugated channels. At Reynolds number (Re)20,000, corrugated channels with winglets exhibit 167.7 % and 61.8 % higher Nusselt numbers compared to smooth and corrugated channels, respectively. However, this enhanced heat transfer accompanies increased pressure drop. Both heat transfer and pressure drop rise with higher Reynolds numbers (Re), corrugation amplitude, and winglet length. This study provides insights into heat transfer mechanisms in corrugated channels and the potential for improvement through winglet vortex generators. |
| first_indexed | 2024-03-09T07:34:22Z |
| format | Article |
| id | doaj.art-8769eb8d14124fd1b3f7124088f80bd9 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-03-09T07:34:22Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-8769eb8d14124fd1b3f7124088f80bd92023-12-03T05:41:25ZengElsevierCase Studies in Thermal Engineering2214-157X2023-12-0152103707Thermohydraulic performance study of the effect of winglet inserts and a corrugated wall in a rectangular channelKhamis Musdif Their0Tareq hamad abed1Kafel Azeez2Marwa Alaa Mohsin3University of Anbar, Anbar, IraqRenewable Energy Research Centre, University of Anbar, Anbar, IraqRenewable Energy Research Centre, University of Anbar, Anbar, Iraq; Corresponding author.Department of Laser and Optical Electronics Engineering, Kut University College, IraqThis numerical study investigates the enhancement of heat transfer and pressure drop characteristics in rectangular channels with transverse corrugations and longitudinal winglet vortex generators. Numerical simulations cover a range of Reynolds numbers (Re) (5000–20000) using channels with uniform wall heat flux and fixed wavelength. The study evaluates the influence of geometrical parameters (corrugated channel amplitude and winglet length) on flow and temperature characteristics, average Nusselt number (Nu), and pressure drop. Corrugated channels alone create stationary transverse vortices that impede heat transfer. However, integrating winglet vortex generators introduces beneficial longitudinal vortices, disrupting stationary vortices, perturbing the thermal boundary layer, enhancing near-wall turbulence, and improving fluid mixing and heat transfer compared to smooth and corrugated channels. At Reynolds number (Re)20,000, corrugated channels with winglets exhibit 167.7 % and 61.8 % higher Nusselt numbers compared to smooth and corrugated channels, respectively. However, this enhanced heat transfer accompanies increased pressure drop. Both heat transfer and pressure drop rise with higher Reynolds numbers (Re), corrugation amplitude, and winglet length. This study provides insights into heat transfer mechanisms in corrugated channels and the potential for improvement through winglet vortex generators.http://www.sciencedirect.com/science/article/pii/S2214157X23010134Heat transferPressure dropCorrugated channelNusselt number (Nu)WingletReynolds numbers (Re) |
| spellingShingle | Khamis Musdif Their Tareq hamad abed Kafel Azeez Marwa Alaa Mohsin Thermohydraulic performance study of the effect of winglet inserts and a corrugated wall in a rectangular channel Case Studies in Thermal Engineering Heat transfer Pressure drop Corrugated channel Nusselt number (Nu) Winglet Reynolds numbers (Re) |
| title | Thermohydraulic performance study of the effect of winglet inserts and a corrugated wall in a rectangular channel |
| title_full | Thermohydraulic performance study of the effect of winglet inserts and a corrugated wall in a rectangular channel |
| title_fullStr | Thermohydraulic performance study of the effect of winglet inserts and a corrugated wall in a rectangular channel |
| title_full_unstemmed | Thermohydraulic performance study of the effect of winglet inserts and a corrugated wall in a rectangular channel |
| title_short | Thermohydraulic performance study of the effect of winglet inserts and a corrugated wall in a rectangular channel |
| title_sort | thermohydraulic performance study of the effect of winglet inserts and a corrugated wall in a rectangular channel |
| topic | Heat transfer Pressure drop Corrugated channel Nusselt number (Nu) Winglet Reynolds numbers (Re) |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X23010134 |
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