OZone domain error

[kowalskiw]

Some cases returns domain error after running few steps of simulation. Problem applies single OZone simulation. Possible sources of error:

• pressure change is to high due to mass of fire products released or smoke extractors/inlets;
• size of fire is not proportional to geometry of compartment - area/volume or height (should not have an influence on localised fire);
• opening tables should not have temperature values less than initial temp and initial opening percentage should be greater than zero.

There's need to check sources of the error and find proper solution (i.e. implement limit of HRR or ventilation depending on enclosure geometry).

[kowalskiw]

Main.remove_false() function deals with passing any simulation with error. Removes false results generated by stochastic software. Passing some simulations reduce MC accuracy. May not have such an impact while number of errors is much lower than number of iterations.

[kowalskiw]

Basing on results of example simulation it could be assumed that domain error is connected with high pressure (p_floor parameter in .pri file). Usually value of p_floor is from -3 Pa to 3 Pa. In simulations when the error occurred pressure exceeded 250 Pa.

Ventilation conditions was the same in whole series. I am looking for the reason of such a high pressure values.

[kowalskiw]

An error is connected with '% of Total Openings' value in Parameters window of OZone3. You shouldn't use small values as 1 or 2, because this particular DOMAIN error will occur when pressure is high enough.

BTW OZone can handle even higher pressure amplitudes ca 500Pa if ventilation is properly set.

The source of DOMAIN error has been found, I am closing this issue.