I am having difficulty visualizing it at that angle. Pehaps you could show the geometry a better picture with some descriptions of where the BCs are, etc. Do you need or want to use Fluent Meshing or can you use ANSYS Meshing? Typically air bearings are very thin in one direction so it is useful to decompose the geometry to obtain a high quality hex mesh with high aspect ratio elements. Simply using a “tet-bomb” approach will result in too many elements. Are you going to include mesh motion in your simulation? These are all important things to consider before undertaking such a project.
Welcome to the world of CFD:)
P.S. Most of us cannot download files from random sites. Please make images (and marked up images are even better) and post them here. ANSYS has created this nice forum that hosts these pictures quite well.