Akademik Veri Yönetim Sistemi
Sadhana - Academy Proceedings in Engineering Sciences, cilt.51, sa.1, ss.1-20, 2026 (Scopus)
In the present study, two-dimensional transient flow over circular cross-sectional smooth and grooved cylinders in tandem is investigated comparatively using delayed eddy simulation (DDES) based on shear stress transport (SST) k-omega turbulence model for Reynolds numbers 10 ≤ReD=≤ 65000 . Flow and the heat transfer characteristics are presented for various gap ratios (1 ≤ L/D ≤ 8) between two cylinders where L and D are the distance between the cylinders and diameter, respectively. Following successful validations the study is extended to the flow past circumferentially grooved heated cylinders in tandem. It is shown that texturing the surfaces of the both cylinders reduces the heat transfer in comparison with the smooth cylinders in tandem while texturing with circumferentially grooves increases the drag coefficients of upstream and downstream cylinders. Regardless of the Reynolds number, it is found that the critical gap ratio for the grooved cylinders in tandem is L/D=4 since the Nusselt becomes minimum at this gap ratio while both the drag coefficient and the Strouhal number become independent of the gap ratio after that.