Conjugate Heat Transfer Analysis for Cooling of a Conductive Panel by Combined Utilization of Nanoimpinging Jets and Double Rotating Cylinders

Author:

Kolsi Lioua1ORCID,Selimefendigil Fatih23,Gasmi Hatem45,Alshammari Badr M.6ORCID

Affiliation:

1. Department of Mechanical Engineering, College of Engineering, University of Ha’il, Ha’il City 81451, Saudi Arabia

2. Department of Mechanical Engineering, College of Engineering, King Faisal University, Al Ahsa 31982, Saudi Arabia

3. Department of Mechanical Engineering, Celal Bayar University, 45140 Manisa, Turkey

4. Department of Civil Engineering, College of Engineering, University of Ha’il, Ha’il City 81451, Saudi Arabia

5. Laboratoire d’Ingénierie Géotechnique, Ecole Nationale d’Ingénieurs de Tunis, Université de Tunis El Manar, Tunis 1007, Tunisia

6. Department of Electrical Engineering, College of Engineering, University of Ha’il, Ha’il City 81451, Saudi Arabia

Abstract

In this work, double rotating active cylinders and slot nanojet impingement are considered for the cooling system of a conductive panel. Colder surface temperatures of the cylinders are used, while different rotational speeds are assigned for each of the cylinders. The impacts of cylinder rotational speeds, size and distance between them on the cooling performance are evaluated. The rotational effects and size of the cylinders are found to be very effective on the overall thermal performance. At the highest rotational speeds of the cylinders, the average Nusselt number (Nu) rises by about 30.8%, while the panel temperature drops by about 5.84 °C. When increasing the cylinder sizes, temperature drops become 7 °C, while they are only 1.75 °C when varying the distance between the cylinders. Subcooling and nanofluid utilization contributes positively to the cooling performance, while 1.25 °C and 10 °C temperature drops are found by varying the subcooled temperature and solid volume fraction. An artificial neural network is used for the estimation of maximum and average panel temperatures when double cylinder parameters are used as the input.

Funder

Deputy for Research & Innovation, Ministry of Education through Initiative of Institutional Funding at University of Ha’il - Saudi Arabia

Publisher

MDPI AG

Subject

General Materials Science,General Chemical Engineering

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