ANSYS ICEM CFD QUAD can generate either 2D meshes or 3D surface meshes consisting of triangles, quads or a mixture of both. These types of meshes are shown below:

	ALL QUAD	QUAD + TRI(1)
	QUAD Dominant (Several Tri)	TRI

2D MESHING: For 2D meshing the geometry input requires no surfaces, the mesh can be generated direct from curve data. The first stage is for the user to select the area to mesh, this is done by picking the CAD curves that define the boundary of the domain and ICEM CFD QUAD then defines this a loop. The user then sets the mesh sizes for the boundaries and the mesh is then calculated. This process is outlined below: 

	Imported CAD Data	Loop Definition is completed behind the scenes	Completed Mesh

3D SURFACE MESHING: The user selects a group of surfaces to be meshed. QUAD then calculates the perimeter loop and assigns the sizes set globally and on curves and surfaces. Nodes are automatically projected to the CAD surface data. A full suite of diagnostic tools are available to check quality. This process is outlined below.

Imported CAD Data

Loop Definition

Completed Mesh