I am trying to run an indoor air quality simulation of a standard dwelling unit design which I have modified with dust filters and foliage set as perforated plate-type porous material in the window area. The porous materials deal with micrometer-sized values. There doesn’t seem to be any problems in my geometry, although I’ve only been guessing my mesh settings just enough for the volume ratio to be <<100.

I’ve gone through several mesh refinements and simulation runs only to come up with this same error rooting from roughly the same coordinates in my model.

It seems that the problem comes from the “Mesh Screens” Porous media. How did you calculate the free area ratio for this? If I include these parts in the “Foliage”, then the simulation does not fail for example.

Hi Fillia! Thank you for taking time to check out my project concern!

I came up with the free area ratio of the Mesh Screens by converting the micro-sized hole dimensions of the filter into square meters then dividing that by the total area of the filter itself: