Close the modeling window, then initiate the meshing process by clicking on Mesh in the workflow.
Set Mesh Size
Using the Mesh resolution slider, we can edit how precise our mesh is for our calculations. Move the slider all the way to the right, to give us the most accurate data. Under Global Sizing, change the Size function method to Curvature. The Curvature option allows the mesh to become more refined closer to the circle.
Click Generate Mesh under Output or at the top of the screen by the status window for Mesh. AIM should detect you are ready to generate the mesh and highlight the buttons in blue.