Designating a part of mesh as wall
 

Hi everyone, I am a student of IITMADRAS. Am new to fluent. Am simulating flow for an axisymmetric model- a cylinder of length 1m and dia 5 cm. After i mesh the cylinder can i designate part of the mesh as wall in the zone definition types??My problem is I have a wall (a single edge) at 0.25 m and i have to mesh the model around it. SO help!!!! And also any fluent users at IITM, I wud appreciate their contact details...could use help in this thing. Thanks