Effect of a Controller Wire on the Hydro-thermal Characteristics Around Circular Cylinder in a Channel: Numerical Study

In this work, the effect of a controller wire on the hydro-thermal flow characteristics around a circular cylinder in a channel was studied. The two-dimensional unsteady and incompressible flow with heat transfer was investigated by solving the Navier-Stokes and energy equations using control volume methodology. The second-order upwind scheme is used to discretize convective terms. The discretized equations are solved by PISO algorithm. The angular position for the wire investigated from 0° to 180° from the forward stagnation point and the diameter ratio for wire and the cylinder is set at 0.05 to 0.4, in laminar Reynolds numbers. The surface Nusselt number of cylinder is increased by adding a wire on the cylinder surface between 90ᵒ and 180ᵒfrom the forward stagnation point. In addition, as the Reynolds number decreases, the effects of adding a wire on the main cylinder are becoming stronger.