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Problem Setup > Boundary conditions

The four types of boundaries we defined are specified in a window as zones. Recall that we We don't need to set any parameters for the centerline and wall zones zone. Verify this by selecting each of these two zones that zone and looking at their types its type in the drop down menu below the Zones.

Set centerline to axis boundary type.

Choose inlet and click on Edit.... Change the Velocity Specification Method to Magnitude, Normal to Boundary. Enter 1 m/sfor Velocity Magnitude. This indicates that the fluid is coming in normal to the inlet at the rate of 1 meter per second. Select Intensity and Hydraulic Diameter next to the Turbulence Specification Method. Then enter 1% for Turbulence Intensity and 0.2m for Hydraulic Diameter. Click OK to set the boundary conditions for the inlet.

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