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Rautela, Mayank, Sharma, Sohan, Bisht, Vijay, Debbarma, Ajoy, Bahuguna, Rahul. (1402). Numerical Analysis of Solar Air Heater Roughened with B-Shape and D-Shape Roughness Geometry. هنرهای کاربردی, 10(1), 101-120. doi: 10.22075/jhmtr.2023.30710.1445
Mayank Rautela; Sohan Lal Sharma; Vijay Singh Bisht; Ajoy Debbarma; Rahul Bahuguna. "Numerical Analysis of Solar Air Heater Roughened with B-Shape and D-Shape Roughness Geometry". هنرهای کاربردی, 10, 1, 1402, 101-120. doi: 10.22075/jhmtr.2023.30710.1445
Rautela, Mayank, Sharma, Sohan, Bisht, Vijay, Debbarma, Ajoy, Bahuguna, Rahul. (1402). 'Numerical Analysis of Solar Air Heater Roughened with B-Shape and D-Shape Roughness Geometry', هنرهای کاربردی, 10(1), pp. 101-120. doi: 10.22075/jhmtr.2023.30710.1445
Rautela, Mayank, Sharma, Sohan, Bisht, Vijay, Debbarma, Ajoy, Bahuguna, Rahul. Numerical Analysis of Solar Air Heater Roughened with B-Shape and D-Shape Roughness Geometry. هنرهای کاربردی, 1402; 10(1): 101-120. doi: 10.22075/jhmtr.2023.30710.1445

Numerical Analysis of Solar Air Heater Roughened with B-Shape and D-Shape Roughness Geometry

Journal of Heat and Mass Transfer Research
دوره 10، شماره 1 - شماره پیاپی 19، مرداد 2023، صفحه 101-120    اصل مقاله (1.34 M)
نوع مقاله: Full Length Research Article
شناسه دیجیتال (DOI): 10.22075/jhmtr.2023.30710.1445
نویسندگان
Mayank Rautela1؛ Sohan Lal Sharma* 2؛ Vijay Singh Bisht1؛ Ajoy Debbarma2؛ Rahul Bahuguna1
1Department of Thermal Engineering, Faculty of Technology, Veer Madho Singh Bhandari Uttarakhand Technical University, Dehradun, 248007, U.K., India
2Department of Mechanical Engineering, National Institute of Technology, Hamirpur, 177005, H.P., India
تاریخ دریافت: 31 اردیبهشت 1402،  تاریخ بازنگری: 07 شهریور 1402،  تاریخ پذیرش: 10 شهریور 1402 
چکیده
A 2-D computational analysis of heat transfer augmentation and fluid flow characteristics with B-shaped and D-shaped artificial roughness has been carried out under the Reynolds number (Re) range from 4000-20000. Comparing the predictions of different turbulence models with experimental results available in the literature, the renormalization group k-Ɛ (RNG) turbulence model is selected for the present study. A detailed analysis of heat transfer variation was done using various geometrical parameters such as four different pitch (P) values of 10, 15, 20, and 25 mm corresponding to pitch ratio (P/e) of 11.111, 16.666, 22.222, and 27.777 respectively, at constant height (e) of 0.9 mm. The highest value of Nusselt number (Nu) improvement reached up to 2.264 times and 21.91 times at P/e of 11.111 for B-shape and D-shape roughness respectively for Re of 20000 as compared to the smooth channel. A significant enhancement of heat transfer is predicted in the present simulation and the maximum Thermohydraulic Performance Parameter (THPP) attained up to 1.47 for B-shaped roughness. The novelty of the proposed model appears as present numerical findings offer better performance compared to existing research.
کلیدواژه‌ها
Solar air heater؛ B-shape roughness؛ D-shape roughness؛ Nusselt number؛ Friction factor. Thermohydraulic performance
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