Bound vortices are stable, rotating flows of fluid that are attached to a solid object, such as an airfoil or a wing. These vortices form due to the pressure differences created by the shape of the object moving through the fluid, leading to a spiral motion around the object. They play a crucial role in generating lift, which is essential for the flight of aircraft. In aerodynamics, bound vortices are often associated with the concept of circulation, which describes the total rotation of the fluid around the object. Understanding bound vortices helps engineers design more efficient aircraft and improve performance by minimizing drag and maximizing lift.