Flow dynamics and heat transfer in the wake of an rotary oscillating circular cylinder with an isothermal control plate

Abstract

This research explores the flow dynamics and heat transfer within the wake of a rotary oscillating circular cylinder in the presence of an isothermal control plate. Two-dimensional, unsteady, viscous and laminar flow of a Newtonian fluid is considered using the Higher Order Compact Scheme (HOC) to discretize the governing equations and the Bi-Conjugate Gradient Stabilized method to solve the resulting system. Simulations are performed for various gap ratios, maximum angular velocities, and frequency ratios of oscillation at Prandtl number 0.7 and Reynolds number 150 using an in-house code. Results show a significant increase in heat transmission for $d/R_0=0.5$ and $f/f_0=0.5$ for all α_m. Drag and lift coefficients are also analyzed, with the maximum peak of the drag coefficient decreasing by 9.88% for $d/R_0=3.$ This research offers valuable insights for advancing and optimizing aerodynamic forces and heat transfer processes, particularly in the field of fluid dynamics. The study focuses on enhancing the efficiency of heat transfer mechanisms around rotary oscillating circular cylinders, contributing to the development of cutting-edge technologies in aerodynamics and thermal management.

Keywords:

• Circular cylinder
• cold control plate
• heat transfer
• HOC
• Navier–Stokes equations

Acknowledgments

The third author is grateful to SERB India for providing financial support (Grant No.: $\mathit{\text{MTR}}/2023/000403$) during the preparation of this manuscript.

Data availability statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

Disclosure statement

No potential conflict of interest was reported by the authors.