combustion of solid rocket propellant
 

Hello everyone
I am new to cfd and fluent 6.3. first of all I tried to define a new material following a post in this forum and the material got created. Then when I tried to use that material in non premixed combustion then that material was not found. I am also having problems in defining the boundary conditions and zones for 2D cylindical grain in Gambit. when the msh file is imported the zones are getting divided. Please help.