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Change the Discretization for Momentum, Turbulence Kinetic Energy and Turbulence Dissipation Rate equations to Second Order Upwind (if you do not see all of the equations scroll down to see them).

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Solution > Monitors > Residuals, Statistic and Force Monitors

Double click on Residuals.Notice that Convergence Criterion has to be set for the k and epsilon equations in addition to the three equations in the last tutorial. Set the Convergence Criterion to be 1e-06 for all five equations being solved.

Select Print to Console and Plot under Options (these are the defaults). This will print as well plot the residuals as they are calculated which you will use to monitor convergence.

Click OK.

Set Initial Guess

We'll use an initial guess that is constant over the entire flow domain and equal to the values at the inlet:

Solution > Solution Initialization > Standard Initialization



In the Solution Initialization menu that comes up, choose inlet under Compute From. The Axial Velocity for all cells will be set to 1 m/s, the Radial Velocity to 0 m/s and the Gauge Pressure to 0 Pa. The Turbulence Kinetic Energy and Dissipation Rate(scroll down to see it) values are set from the prescribed values for the Turbulence Intensity and Hydraulic Diameter at the inlet.

Click Initialize (this is easy to overlook). 

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In the Iterate menu that comes up, change the Number of Iterations to 700. Click Calculate.

The solution converges in a total of about 220 iterations. You may get a different number of iterations to convergence depending on your mesh and software version.

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File > Data File Quantities

Under Additional Quantities, select Skin Friction Coefficient, which should be roughly half way down. Your window should now look like this:

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