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Now that the fluid has been described, we are ready to set the boundary conditions of the simulation. Bring up the boundary conditions menu by selecting Problem Setup > Boundary Conditions. In the Boundary Conditions window, look under Zones. First, let's set the boundary conditions for the inlet. Select Inlet to see the details of the boundary condition. The boundary condition type should have defaulted to velocity-inlet: if it didn't, select it. Now, click Edit to bring up the Velocity-Inlet Window. We need to specify the magnitude and direction of the velocity. Select Velocity Specification Method > Components. Specify X-Velocity as 0.9945 m/s and Y-Velocity as 0.1045 m/s. When you have finished specifying the velocity as entering the inlet at 6 degrees (the same thing as having an angle of attack of 6 degrees), press OK

Outlet

In the Boundary Conditions window, look under Zones. Select Outlet to see the details of the boundary condition. The boundary condition type should have defaulted to pressure-outlet: if it didn't, select it. Click Edit, and ensure that the Gauge Pressure is defaulted to 0. If it is, you may close this window.

Airfoil

In the Boundary Conditions window, look under Zones and select airfoil. Select Type > Wall if it hasn't been defaulted.

Reference Values

The final thing to do before we move on to solution is to acknowledge the reference values. Go to Problem Setup > Reference Values. In the Reference Values Window, select Compute From > Inlet. Check the reference values that appear to make sure they are as we have already set them.

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