{include: FLUENT Google Analytics}
{include: Turbulent Jet - Panel}

h1. Turbulent Jet Setup and Solution

Use the same case and data files as you downloaded in the Laminar setup for the geometry and mesh. 

Now, set up the k-ε model for turbulence. In Solution Setup-Models, double click the previous "Viscous-Laminar" option to open the dialogue. Select the "k-epsilon (2eqn)" model for turbulence. Leave the model constants the same as defined in the dialogue below; these values have been refined to constraints of the model and are typically not varied. 

The following empirical formulas are useful in defining this model. I is the turbulent intensity, d is the hydraulic diameter, and d is the jet diameter. 

{latex}\large
$$
{I} = {0.16Re^{-1/8}}
$$
{latex}
\\

{latex}\large
$$
{d_H} = {d}
$$
{latex}
\\
{latex}\large
$$
{l} = {0.07d}
$$
{latex}
\\

{latex}\large
$$
{\epsilon} = {C_\mu^{3/4}k^{3/2} \over l}
$$
{latex}
\\

{latex}\large
$$
{k} = {3 \over 2 (UI)^2}
$$
{latex}
[Go to Step 5: Turbulent Jet Results|Turbulent Jet - Turbulent Results]

[Go to all FLUENT Learning Modules|SIMULATION:FLUENT Learning Modules]