Magnetic Field Effect on the Near and Far Cylinder Wakes

The present numerical simulation focuses on the elecro-conductor fluid flow over a circular cylinder. Our principal goal is to control the upstream and downstream flows by external applied magnetic aligned field. A different values of magnetic interaction number N (Stuart number) have been selected for this control method, and the Reynolds number flow control to be maintained invariant Re= 550.The results show that the downstream flow deceleration is associated to the disappearance of shedding eddies mechanism, On the other hand, on upstream side stagnation point, the boundary layer thickness increase with Stuart number increasing. We note also the appearance of new eddies at near side shear layers that degenerate in the transversal direction with high Stuart number. These last eddies influenced considerably the boundary layer separation point's position over cylinder.