Numerical investigation of semi-empirical relation representing nusselt number under waterjet impingement
Extruded surfaces, such as pin fin, enable better heat transfer distribution when accompanied by fluid jets. A numerical study is carried out, in which a waterjet is being impinged on the pin-fin target surface, and the Nusselt profile is evaluated for various impinging and geometric parameters. Im...
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| Language: | English English |
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American Institute of Aeronautics and Astronautics
2020
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| Online Access: | http://irep.iium.edu.my/81540/ http://irep.iium.edu.my/81540/1/1.T5947.pdf http://irep.iium.edu.my/81540/7/81540_Numerical%20investigation%20of%20semi-empirical%20relation_scopus.pdf |
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| author | Siddiqui, Mohammad Umair Ansari, Emad Khan, Sher Afghan Patil, Rajesh |
| author_facet | Siddiqui, Mohammad Umair Ansari, Emad Khan, Sher Afghan Patil, Rajesh |
| author_sort | Siddiqui, Mohammad Umair |
| building | IIUM Repository |
| collection | Online Access |
| description | Extruded surfaces, such as pin fin, enable better heat transfer distribution when accompanied by fluid jets. A
numerical study is carried out, in which a waterjet is being impinged on the pin-fin target surface, and the Nusselt profile is evaluated for various impinging and geometric parameters. Impinging parameters, such as Reynolds number and nondimensional nozzle-surface distance, are varied, whereas geometric parameters, such as nondimensional pin-fin height and nondimensional pin-fin spacing, are being subjected to variation. The local Nusselt magnitudes evaluated for different impinging and geometric parameters are plotted against nondimensional radial distance of the target surface. Regression analysis is carried out and semi-empirical relations are proposed for local Nusselt number magnitude in terms of impinging and geometric parameters. The correlations are well-validated against the results of previous literature studies. In addition, grid independence tests and turbulence modeling tests are performed to obtain a model that can predict accurate results. It is found that the shear stress transport � γ − θ model predicts the most accurate results. |
| first_indexed | 2025-11-14T17:52:05Z |
| format | Article |
| id | iium-81540 |
| institution | International Islamic University Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-14T17:52:05Z |
| publishDate | 2020 |
| publisher | American Institute of Aeronautics and Astronautics |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | iium-815402020-11-10T14:00:59Z http://irep.iium.edu.my/81540/ Numerical investigation of semi-empirical relation representing nusselt number under waterjet impingement Siddiqui, Mohammad Umair Ansari, Emad Khan, Sher Afghan Patil, Rajesh TL1 Motor vehicles Extruded surfaces, such as pin fin, enable better heat transfer distribution when accompanied by fluid jets. A numerical study is carried out, in which a waterjet is being impinged on the pin-fin target surface, and the Nusselt profile is evaluated for various impinging and geometric parameters. Impinging parameters, such as Reynolds number and nondimensional nozzle-surface distance, are varied, whereas geometric parameters, such as nondimensional pin-fin height and nondimensional pin-fin spacing, are being subjected to variation. The local Nusselt magnitudes evaluated for different impinging and geometric parameters are plotted against nondimensional radial distance of the target surface. Regression analysis is carried out and semi-empirical relations are proposed for local Nusselt number magnitude in terms of impinging and geometric parameters. The correlations are well-validated against the results of previous literature studies. In addition, grid independence tests and turbulence modeling tests are performed to obtain a model that can predict accurate results. It is found that the shear stress transport � γ − θ model predicts the most accurate results. American Institute of Aeronautics and Astronautics 2020-07-09 Article PeerReviewed application/pdf en http://irep.iium.edu.my/81540/1/1.T5947.pdf application/pdf en http://irep.iium.edu.my/81540/7/81540_Numerical%20investigation%20of%20semi-empirical%20relation_scopus.pdf Siddiqui, Mohammad Umair and Ansari, Emad and Khan, Sher Afghan and Patil, Rajesh (2020) Numerical investigation of semi-empirical relation representing nusselt number under waterjet impingement. Journal of Thermophysics and Heat Transfer, 34 (3). pp. 579-590. ISSN 0887-8722 https://arc.aiaa.org/doi/full/10.2514/1.T5947 10.2514/1.T5947 |
| spellingShingle | TL1 Motor vehicles Siddiqui, Mohammad Umair Ansari, Emad Khan, Sher Afghan Patil, Rajesh Numerical investigation of semi-empirical relation representing nusselt number under waterjet impingement |
| title | Numerical investigation of semi-empirical relation representing nusselt number under waterjet impingement |
| title_full | Numerical investigation of semi-empirical relation representing nusselt number under waterjet impingement |
| title_fullStr | Numerical investigation of semi-empirical relation representing nusselt number under waterjet impingement |
| title_full_unstemmed | Numerical investigation of semi-empirical relation representing nusselt number under waterjet impingement |
| title_short | Numerical investigation of semi-empirical relation representing nusselt number under waterjet impingement |
| title_sort | numerical investigation of semi-empirical relation representing nusselt number under waterjet impingement |
| topic | TL1 Motor vehicles |
| url | http://irep.iium.edu.my/81540/ http://irep.iium.edu.my/81540/ http://irep.iium.edu.my/81540/ http://irep.iium.edu.my/81540/1/1.T5947.pdf http://irep.iium.edu.my/81540/7/81540_Numerical%20investigation%20of%20semi-empirical%20relation_scopus.pdf |