How to simulate outgasing of an o-ring

Hi !
I want to simulate a vacuum chamber with a lot of o-rings (material : FKM/Viton).
Does a specific command exist in Molflow ?
Or do I simply need to build a toroidal shape inside the vacuum chamber for each o-ring ?

Thank you
Raph

There isn’t a special command for rings.
You can simplify a toroidal shape with a simple flat ring (1 facet), and set the outgassing to “uniform”.
In your image, the gas would be stuck in the O-ring groove, unless you deliberately leave a gap between the brown and light gray volumes in the 3D model.

1 Like

Thank you !

I do not understand when “uniform” or “cosin” outgassing should be used. Is there any specific topic in the forum ?

It is explained in the documentation (Facet Parameters panel section), I paste a screenshot.