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The k-ε model is one of the most widely used closure models in which two additional equations are solved for variables k and ε. This model is complete, in that these two variables can be manipulated to describe a a turbulent length and time scale.  The assumptions made in using this model are that the two k and ε transport equations are valid, and the turbulent viscosity hypothesis, that the Reynolds stresses are proportional to the mean rate of strain (similar to the Newtonian hypothesis relating stress and strain that is used in the Navier Stokes equations).

This is a more advanced tutorial than the other turbulent flow tutorials on this site, and requires you to export data for analysis and equation manipulation for the Results section onward.

Starting Fluent

While the actual jet inflow is much smaller than the mesh, the additional jet area at the inlet allows for entrainment of air near the inlet, and radial dispersal of the fluid into the surroundings as X increases. 

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