Numerical study of flow and thermal characteristics of pulsed impinging jet on a dimpled surface
This research comprehensively investigates the flow and thermal characteristics of a pulsating impinging jet over a dimpled surface. It analyzes the impact of key parameters (e.g., inlet velocity pulsation functions, pulsation frequency, amplitude, dimple pitch, dimple depth, Reynolds number) on flo...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-03-01
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| Series: | Theoretical and Applied Mechanics Letters |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095034924000126 |
| _version_ | 1797248336999219200 |
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| author | Amin Bagheri Kazem Esmailpour Morteza Heydari |
| author_facet | Amin Bagheri Kazem Esmailpour Morteza Heydari |
| author_sort | Amin Bagheri |
| collection | DOAJ |
| description | This research comprehensively investigates the flow and thermal characteristics of a pulsating impinging jet over a dimpled surface. It analyzes the impact of key parameters (e.g., inlet velocity pulsation functions, pulsation frequency, amplitude, dimple pitch, dimple depth, Reynolds number) on flow patterns and heat transfer. Validated computational fluid dynamics (CFD) and the Re-Normalization Group (RNG) turbulence model are employed to accurately simulate complex turbulent flow behavior. Local and average heat transfer coefficients are calculated and compared to steady impingement cases, revealing the potential benefits of pulsation for heat transfer enhancement. The study also examines how pulsation-induced flow modulation and thermal mixing affect heat transfer mechanisms. Results indicate that combining fluctuating flow with a dimpled surface can improve heat transfer rates. In summary, increasing pulsation amplitude consistently enhances heat transfer, while the effect of frequency varies between impinging and wall jet zones. |
| first_indexed | 2024-04-24T20:12:59Z |
| format | Article |
| id | doaj.art-4a3dc5b185b445abb3675a544880b184 |
| institution | Directory Open Access Journal |
| issn | 2095-0349 |
| language | English |
| last_indexed | 2024-04-24T20:12:59Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Theoretical and Applied Mechanics Letters |
| spelling | doaj.art-4a3dc5b185b445abb3675a544880b1842024-03-23T06:23:54ZengElsevierTheoretical and Applied Mechanics Letters2095-03492024-03-01142100501Numerical study of flow and thermal characteristics of pulsed impinging jet on a dimpled surfaceAmin Bagheri0Kazem Esmailpour1Morteza Heydari2Renewable Energy Research Center, Damavand Branch, Islamic Azad University, Damavand, IranCorresponding author.; Renewable Energy Research Center, Damavand Branch, Islamic Azad University, Damavand, IranRenewable Energy Research Center, Damavand Branch, Islamic Azad University, Damavand, IranThis research comprehensively investigates the flow and thermal characteristics of a pulsating impinging jet over a dimpled surface. It analyzes the impact of key parameters (e.g., inlet velocity pulsation functions, pulsation frequency, amplitude, dimple pitch, dimple depth, Reynolds number) on flow patterns and heat transfer. Validated computational fluid dynamics (CFD) and the Re-Normalization Group (RNG) turbulence model are employed to accurately simulate complex turbulent flow behavior. Local and average heat transfer coefficients are calculated and compared to steady impingement cases, revealing the potential benefits of pulsation for heat transfer enhancement. The study also examines how pulsation-induced flow modulation and thermal mixing affect heat transfer mechanisms. Results indicate that combining fluctuating flow with a dimpled surface can improve heat transfer rates. In summary, increasing pulsation amplitude consistently enhances heat transfer, while the effect of frequency varies between impinging and wall jet zones.http://www.sciencedirect.com/science/article/pii/S2095034924000126Pulsating impinging jetDimpled surfaceHeat transfer enhancementPulsation frequency and amplitudeCoherent structures |
| spellingShingle | Amin Bagheri Kazem Esmailpour Morteza Heydari Numerical study of flow and thermal characteristics of pulsed impinging jet on a dimpled surface Theoretical and Applied Mechanics Letters Pulsating impinging jet Dimpled surface Heat transfer enhancement Pulsation frequency and amplitude Coherent structures |
| title | Numerical study of flow and thermal characteristics of pulsed impinging jet on a dimpled surface |
| title_full | Numerical study of flow and thermal characteristics of pulsed impinging jet on a dimpled surface |
| title_fullStr | Numerical study of flow and thermal characteristics of pulsed impinging jet on a dimpled surface |
| title_full_unstemmed | Numerical study of flow and thermal characteristics of pulsed impinging jet on a dimpled surface |
| title_short | Numerical study of flow and thermal characteristics of pulsed impinging jet on a dimpled surface |
| title_sort | numerical study of flow and thermal characteristics of pulsed impinging jet on a dimpled surface |
| topic | Pulsating impinging jet Dimpled surface Heat transfer enhancement Pulsation frequency and amplitude Coherent structures |
| url | http://www.sciencedirect.com/science/article/pii/S2095034924000126 |
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