Definitions for "Laminar flow"
Describes the fluid flow pattern. At low velocity, and low Reynolds numbers, flow streams tend to be parallel and well-organized. The fluid speed at the center of the pipe is much greater than near the pipe wall.
Apparently random flow that is not random but defies our ability to analyze it at this time.
Streamline flow of a fluid. The mass of fluid advances in separate sheets with simple shear existing at the surface of contact of different layers if the layers move at different speeds.
Keywords:  unidirectional, airflow, see
See: Unidirectional Airflow