Skin friction arises from the interaction between the fluid and the skin of the body, and is directly related to the area of the surface of the body that is in contact with the fluid. Skin friction follows the drag equation and rises with the square of the velocity.
skin friction arises from the interaction between the fluid and the skin of the body and is directly related to the area of the surface of the body that is in contact with the fluid skin friction follows the drag equation and rises with the square of the velocity