Modelling cracks between floorboards

[ollyc]

I am attempting to model a Victorian terraced house with a suspended timber floor which is ventilated below by airbricks. I have modelled the airbricks as windows in a shallow room below the floor and will make them open 100% of the time in MacroFlo.

Would it be possible to use MacroFlo to model the cracks between the floorboards so that the cold air can infiltrate into the main living space? Any ideas how I could do this? I could make a door in the floor and perhaps have the crack length set to some value much greater than 100% as a proxy for the many cracks between floorboards? Perhaps I should just be setting a general ACH value for the room in ApacheSim, however I think it would be nice to use a more detailed approach and shed some light on how important it is to air-tighten this floor.

Thanks,
Olly

[harshadj]

Hi ollyc,

I think your procedure should work fine. If you are doing pure natural ventialtion study I would switch natural ventilation ON and leave off the ACH values.