Loft-pitched roof and atrium construction problems

[aigloudi]

Hello,
I want to use MicroFlo for simulating airflow in a 2 story residential house with a slope roof and an atrium.
My queries (3!) are:
1) How should i construct a loft, meaning a 1st floor slab that covers half the ground-floor slab in the plan, so that the microflo takes into account the gap? If i make each floor a different "room", each one has its own slab and ceiling, without hole. And i cannot make a hole in the floor i don't know why. Then, should i make them one room, and the slab as a partition? again, how can i put partition horizontally? in the views it is difficult to see the exact points and make the exact shape. When i import it from another program it is corrupt.
2)Another thing is that i have an atrium which i want to show the airflow. I make internal holes instead of windows between atrium and living room and again the boundary seems to not understand this connection. it seems like the atrium is out of the house and no airflow at all.
3)Last but not least, the roof generator is making only certain kinds of roofs. I need to make a single 20 degrees pitched roof, one plane with rotation with living space underneath, which means the external and internal walls need to be cut in this slope. I tried to do that with a plane and trim the walls but it was totally disaster. Is there a simple way to construct this simple roof that i cannot now think?i guess this problem is common for many here.
Thank you in advance and sorry for the long message!

[PCully]

1. Model the two parts as separate rooms and in the partition between them draw a hole, if you can't add a hole then there is some problem with the geometry you have drawn

2. Make sure you have applied boundary conditions correctly and set pup the model adequately for the CFD analysis in MicroFlo, running ApacheSim first if necessary to generate boundary conditions data.

3. The single click roof generator can only be relied upon for simplistic roofs, in many realistic cases you should model the roof manually. Generally we give guidance on drawing a complex roof structure in bits then connecting them. Remember you can model in Front view, side view etc and also the Divide Space tool can be very powerful for getting complex shapes cut out form masses.

It's hard to say if you have had training from us or not but certainly for running CFD analysis in MicroFlo it would be recommended. Maybe ModelIT as well so you can create a good quality model for this.

Phil