It occurs when the ratio of inertial forces to viscous forces exceeds a critical value.
Kolmogorov developed a model explaining how an influx of energy triggers this type of phenomenon. It can be characterized by the appearance of von Kármán vortex streets and significant non-linearities in the Navier-Stokes equation. It occurs when the ratio of inertial forces to viscous forces exceeds a critical value. Large values of the Reynolds number characterize this type of flow. For 10 points, name this chaotic type of fluid flow, contrasted with laminar flow, which can result in irregular air motion in the atmosphere capable of affecting aircraft flight.
Kolmogorov developed a model explaining how an influx of energy triggers this type of phenomenon.
{turbulent} flow [or {turbulence}; accept {chaotic flow} before mentioned]