For example, when fluid passes over a solid body, the streamlines get closer together, the flow velocity increases, and the pressure decreases. Airfoils are designed so that the flow over the top ...

Key factors opposing efficient airfoil performance include turbulence and skin friction, which can be reduced by using smoother surfaces and streamlined shapes. The film illustrates how the angle ...

Whether the flow is viscous-drag dominated or pressure-drag dominated depends entirely on the shape of the body. A streamlined body looks like a fish, or an airfoil at small angles of attack, whereas ...