Turbulence or Turbulent flow is a flow regime characterized by low momentum diffusion, high momentum convection, and pressure and velocity variation with time. It is opposed by laminar flow. The (dimensionless) Reynolds number characterizes whether flow conditions lead to laminar or turbulent flow.
Laminar flow. A smooth and regular flow which looks somewhat solid because the flow maintains a fixed shape. In this regime, the water acts as a transparent lense.
Turbulent flow. At a certain point the water will start to break up. The water no long stays contained in a stable region is space. The stream ceases to be transparent.
... of 2000, there are 53,364 people, 21,348 households, and 13,363 families residing in the city. The population density is 481.1/km² (1,246.0/mi²). Th ...