Assign air to the internal flow volume in an AEC model

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To prepare for running an ambient room temperature simulation in Autodesk CFD,

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you must specify the physical characteristics of the model.

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This includes assigning a material of air to the internal flow volume.

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To start, press CTRL and middle-click the wall to hide it.

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Left-click to select the internal flow volume.

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Then, on the ribbon, in the Setup tab, Materials panel, click Edit.

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The Materials quick edit dialog opens, where you can select the material type.

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For this example, under Property settings, click the Type value to expand the drop-down, and select Fluid.

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Next, expand the Name drop-down and select Air.

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Next, define the properties of air to vary with temperature.

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This allows buoyancy, or natural convection, to affect the air flow.

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In the Environment row, click Set.

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In the Material Environment dialog, select Variable, and click OK.

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Click Apply.

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To verify that air is properly assigned, in the Design Study Bar, confirm the material assignment for the Air part.

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Then, in the graphics window, ensure that the color of the internal air part now matches the Air color in the legend.

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With this material assigned, you are ready to move on to the next step of preparing your model for a CFD simulation.