# சீர்வரிகள், கீற்றுவரிகள், மற்றும் பாதைவரிகள்

Solid blue lines and broken grey lines represent the streamlines. The red arrows show the direction and magnitude of the flow velocity. These arrows are tangential to the streamline. The group of streamlines enclose the green curves (${\displaystyle C_{1}}$ and ${\displaystyle C_{2}}$) to form a stream surface.