Dear all,

I have a question regarding gas free formula implementation: why cell dimensions are used as a parameter for a () operator (see here).

The way how I understand the code is that I have to provide T_ParamClass implementation with operator () overloaded such that it returns a normalized density for a given position vector in real SI units. Then it is a bit unclear how cellSize might be helpful here? My only guess would be a vacuum slab on the top of the domain, but in T_ParamClass I can specify it in SI units as well and compare it to the position directly…

Best regards,

Danila.