Integral Solution for Turbulent Mixing of Two Parallel Air Streams in a Duct

Turbulence is characterized by random fluctuation motions in the longitudinal and transverse direction which have macroscopic effects upon the flow pattern. In the study of fluid flow, it is beneficial to visualize motions of particles of different sizes. The particles can be categorized into those of molecular magnitude and those of a larger scale. The larger scale particles can best be thought of as fluid lumps. Fundamentally, there are two types of fluid flow (laminar and turbulent). In laminar flow, the fluctuation particles are of a microscopic scale. These particles possess only small amounts of mass and energy, thus their motions will have only microscopic effects upon the flow pattern. Turbulence can occur in a multiplicity of flow types. (see more in text