Suppression of Flow Separation Around A Circular Cylinder by Utilizing Lorentz Force

Both experimental and numerical investigations on the flow past a cylinder under the influence of Lorentz force (electromagnetic force) were conducted in an electrically low-conducting fluid. The Lorentz force is applied both locally, wholly and periodically on the surface of the cylinder, and their control effects for flow separation were investigated Both experimental and numerical results show that Lorentz force can suppress the flow separation with Lorentz force applied on both local and whole surface of the cylinder. However, when the periodic and opposite Lorentz force adopted, the cylinder wake cannot be stabilized.