Multiblock Structured Grid in Film Cooling hole with Gambit 2.4
 

I need to make a Multiblock Structured Grid in this geometry of Film Cooling hole, and separate the geometry in 3 blocks (top, down and the hole), to use a hexahedral mesh in all the blocks. how to descompose this geometry in 3 volumes in Gambit 2.4?

ure.excel.ucf.edu/faculty/kassab@mail.ucf.edu/GT2005_68431.pdf