High aspect ratio
 

Hi everybody,
Through Ansys Workbench, I'm to simulating the natural ventilation within a building, so I've modeled the building with an opening, surrounded by a parallelepiped representing the outdoor air.
In design modeler, In order to increase the cells along the building I've diveded the parallelepiped block in many blocks, as also the building walls (which have a thickness of 6 mm).
The problem is when I start meshing with Ansys Meshing. First, I have set some edge sizing with bias factor, so as to increase the number of cells close to the building and in addition to this I've set some body sizing on those blocks more close to the building.
Then, I've tried to mesh all the bodies,at the same time, with Sweep method, but I've some problems with high aspect ratio. So, I've tried to use meshing recorder, so as to mesh some bodies step by step, but this procedure fails for some groups of bodies.
I really don't understand, how could be the better way to proceed.
Any suggestion?
Thanks a lot
Bests