Magneto-convection of nanofluid flow over multiple rotating cylinders in a confined space with elastic walls and ventilated ports

Fatih Selimefendigil; Kaouther Ghachem; Hind Albalawi; Badr M AlShammari; Taher Labidi; Lioua Kolsi

doi:10.1016/j.heliyon.2024.e25101

Magneto-convection of nanofluid flow over multiple rotating cylinders in a confined space with elastic walls and ventilated ports

Heliyon. 2024 Jan 26;10(3):e25101. doi: 10.1016/j.heliyon.2024.e25101. eCollection 2024 Feb 15.

Authors

Fatih Selimefendigil^{1

2}, Kaouther Ghachem³, Hind Albalawi⁴, Badr M AlShammari⁵, Taher Labidi⁶, Lioua Kolsi⁷

Affiliations

¹ Department of Mechanical Engineering, College of Engineering, King Faisal University, Al Ahsa 31982, Saudi Arabia.
² Department of Mechanical Engineering, Celal Bayar University, 45140 Manisa, Turkey.
³ Department of Industrial Engineering and Systems, College of Engineering, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia.
⁴ Department of Physics, College of Sciences, Princess Nourah bint Abdulrahman University (PNU), P.O. Box 84428, Riyadh, 11671, Saudi Arabia.
⁵ Department of Electrical Engineering, College of Engineering, University of Ha'il, Ha'il City, Saudi Arabia.
⁶ Department of Software Engineering, College of Computer Engineering and Sciences, Prince Sattam bin Abdulaziz University, P.O. Box 151, Al-Kharj, 11942, Saudi Arabia.
⁷ Department of Mechanical Engineering, College of Engineering, University of Ha'il, Ha'il City 81451, Saudi Arabia.

Abstract

In this study, convective heat transfer for nanofluid flow over multiple rotating cylinder in a confined space is analyzed under magnetic field while enclosure has one inlet and one outlet port. Three identical circular cylinder are used and the two walls of the cavity are considered to be elastic. The coupled fluid-structure interaction and magneto-convection problem is solved by finite element method. Impacts of rotational Reynolds number (Rew between -100 and 100), Hartmann number (Ha between 0 and 50), cylinder size (R between 0.001H and 0.11H) and Cauchy number (Ca between $10^{- 8}$ and $10^{- 3}$ ) on the flow and thermal performance features are explored. The flow field and recirculation inside the cavity are significantly affected by the activation of rotation and magnetic field. The vortices are suppressed by increasing the strength of magnetic field and thermal performance is improved. Thermal performance of 56.6% is achieved by activation of magnetic field at the highest strength with rotations of the circular cylinders. When rotations are active, heat transfer rate is reduced while up to 40% reduction is obtained without magnetic field. Cylinder size has the highest impact on the overall thermal performance improvement while up to 132% enhancements are achieved. The contribution of elastic walls on the thermal performance is slight while less than 5% improvements in the average heat transfer is obtained. An optimization study leads to 12.7% higher thermal performance improvements as compared to best case of parametric computational fluid dynamics simulation results while the optimum values of (Rew, Ha, R) is obtained as (-80.66, 50, 0.11H).

Keywords: Elastic wall; Finite element method; Magnetic field; Multiple rotating cylinders; Optimization.