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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.

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Solve for 700 iterations.

 Solution > Run Calculation

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

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In addition to the standard data quantities, we would also like to view the results for the Skin Friction Coefficient. This quantity is not transferred to the post-processor by default; so we have to do it manually.

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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