Once you have imported the geometry file initiate the meshing process by clicking on Mesh in the workflow.
Set Mesh Size and Boundary Layer
In the Engineering Intent drop down menu select Fluid flow or fluid-solid heat transfer and use a medium-high mesh resolution setting on the slider. This will automatically adjust the mesh settings for our needs. Ensure that under Global Sizing, the curvature option is being used for the size function method.. In the boundary layer settings under collision avoidance select layer compression.
AIM will prompt the user to fix the boundary layer before generating the mesh, click on boundary layer under Mesh Controls. Select every face except for the future inlet and outlet faces.
Return to the Mesh panel, then click Generate Mesh under Output or at the top of the screen by the status window for Mesh. AIM should detect that you are ready to generate the mesh and highlight the buttons in blue.