| A numerical study of flow in a Periodically Converging Diverging Channel is performed to examine turbulent separated flow and heat transfer characteristics. This geometry has numerous applications in high-performance heat exchanging systems because of its effective influence on heat transfer augmentation. The method is based on the fully conserved control-volume representation of fully elliptic Navier-Stokes, and Energy equations in body-fitted orthogonal curvilinear coordinate system. Turbulence is simulated via two-equation ($kappa$ $-$ $epsilon$) model.;The persented results consist of computed velocity and streamline distributions, the kinetic energy of turbulence, pressure drop, friction factor, and local, average and maximum Nusselt number distribution. Systematic variations are made in Reynolds number (40,000 to 100,000) and the aspect ratio (2a/$lambda$ = 0.27 and 0.34). The study is further extended to flows with different ranges in inlet swirl. The results are compared with the different available experimental data and show that the method with the utilized turbulence closure model and the discretization scheme reproduce the essential features of various channel heat transfer and fluid flow effects observed in experiments. |
