The image you show looks like you are in Fluent. There are two places you can mesh: using Fluent Meshing and using ANSYS Meshing, which you specifically mentioned.
In Workbench, start with a Fluid Flow (Fluent) analysis system. Double click the Geometry cell and create the cylinder in SpaceClaim, then close SpaceClaim.
Now double click on the Mesh cell to open the Meshing software. Right click on the Mesh branch and Insert a Method.
Set the method to Sweep. Type in how many divisions you want.