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Define Boundary Conditions

We'll now set the value of the velocity at the inlet and pressure at the outlet.

Use the following table to set boundary type of each zone.

Main Menu > Define > Boundary Conditions...

Select farfield1 under Zone. Change the Type of boundary as velocity-inlet. A new window will pop up. Change Magnitude, Normal to Boundary to Components  under Velocity Specification Method. Input value 1 next to X-Velocity. Click OK. Do the same for farfield2 and farfield3.

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The (absolute) pressure at the farfield downstream is 1 atm. Since the operating pressure is set to 1 atm, the outlet gauge pressure = outlet absolute pressure - operating pressure = 0. Choose farfield4 under Zone. The Type of this boundary is pressure-outlet. Click on Set.... The default value of the Gauge Pressure is 0. Click Cancel to leave the default in place.

Inlets and click Set. We should set Velocity Specification Method to Components, and set X-velocity to 2.7754. In the Turbulence Area, we should set Specification Method to Intensity and Length Scale, and set Turbulent Intensity to 1.

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All other Boundary Conditions have been set during the meshing process so nothing else should be modified hereLastly, click on cylinder under Zones and make sure Type is set as wall.

Click Close to close the Boundary Conditions menu.

Go to Step 5: Solve!
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