Set inlet dependency based on outlet (simulate breathing)

[craiglynn]

Hello,

I'm not sure if this is possible so looking for a bit of help. I have a design that a user breathes into, each breath cycle the o2% drops by 5% (being replaced with CO2). Is there anyway I can set the inlet dependency for the gas concentration to be a factor of the outlet?

ie.

Outlet cycle 1 0-2 seconds = ambient air = 21% O2, 79% Nitrogen
Inlet cycle 1 2-4 seconds = 16% o2, 79% Nitrogen, 5 % CO2

There is then some mixing in the unit so the next inlet breath would be based on 5% less o2% than that inhaled on the previous cycle.


Thanks
Craig