Define the outlet boundary in a valve model

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To prepare for running a valve model simulation in Autodesk CFD,

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once the inlet conditions are assigned, you must define the outlet boundary conditions.

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In this example, an ambient pressure condition is assigned to the valve outlet.

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This is the typical way to model where flow leaves the device.

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Left-click the outlet surface to select it.

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On the Setup tab of the ribbon, in the Boundary Conditions context panel, click Edit.

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In the Boundary Conditions quick edit dialog, expand the Type drop-down and select Pressure.

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Leave the Unit set to Pa, and set the Pressure to 0.

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This defines a static gage pressure of 0, which simulates the flow outlet.

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Click Apply.

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To verify that the boundary condition is correctly applied to the outlet valve,

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in the Design Study Bar, ensure that the Pressure condition appears with a value of 0 Pa.

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Also, in the graphics window, ensure that the color of the stripe on the outlet face corresponds to the legend.

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With the inlet and outlet boundary conditions properly set, the next step is to define the mesh.