I started using CST recently. Once I assigned PEC boundary property to a cylinder's outer surface. The software recognize it and treated it as a PEC boundary.
PEC boundary condition can be assigned to any shape. but, in some cases PMC can also be assigned. basically, these are being used for metamaterials now a days.
Thank you for your kind attention. But I asked whether a PMC boundary can be assigned to a curved surface such as on a coaxial surface. Is this possible?