Heat transfer and flow around curved corner cylinder: effect of attack angle

The aim of this study is to investigate the fluid flow structure and heat transfer from an isothermal cylinder with a curved corner radius ratio (r/R) of 0.5, and attack angle (α) is varied between 0° ≤ α ≤ 45°. The cylinder is subjected to airflow at a Reynolds number (Re) = 180 and Prandtl number (Pr) = 0.7. This study focuses on the effect of α on the fluid forces, Strouhal number, Nusselt number, and flow structure, and wake bubble size. The sensitivity of the time-mean drag and lift forces is investigated to α, and they appear to be minimum at critical α of 5° and 12°, respectively. The increase of α from 0 to 45° results in about 12.9% enhancement in the heat transfer from the cylinder.