[meedomagdy]

hello, everyone.
I just started using CFD Ansys fluent for my master and I would like to ask some questions about the problems I'm currently facing:
1- I need to design a hollow step ladder that the audience will be sitting on but I can't think of a way to create it and also make holes at the top through which air will flow ( air enters inside the hollow ladder and exit from holes at the top which is below the seat of the audience)
2- for that kind of hollow body which type of mesh should be better Hexa or tetra
3- is share topology necessary without it I always have overlapped bodies but if I made share topology the bodies won't be sweepable bodies and cant create hex even if I used multizone
4- also the holes at the top of the ladder can they be created as a surface and choose type as fluid or it has to be made through cut material