| Streamline flow | Turbulent flow |
| 1. The steady flow of a fluid, with velocity less than certain critical velocity is called streamline or laminar flow. | 1. A non-steady irregular fluid flow in which streamlines and flowtubes change continuously with a velocity greater than certain critical velocity. |
| 2. In a streamline flow, the velocity of a fluid at a given point is always constant. | 2. In a turbulent flow, the velocity of a fluid at any point does not remain constant. |
| 3. Streamlines do not change and never intersect. | 3. Streamlines and flowtubes change continuously. |
| 4. over a surface, and is in the form of coaxial cylinders through a pipe. | 4. Fluid particles still move in general towards the main direction as before. But now all sorts of secondary motions cause eddies or vortices. |
