April 29, 2024 at 4:37 pm
jcooper
Ansys Employee

Hi Arash:

It turns out that here are two issues here 
 
  1. The UDF is actually only allowed for Pdf based combustion models. This limitation is being removed for V 24.2 and it will be usable with species model as well in the future
  2. The UDF example in the tutorial guide is only valid when the nucleation precursor species is chosen from the available species (species that are part of mixture or pdf mixture). The UDF will NOT work with precursor correlations. In principle, it could work with any method, but implementing nucleation for a precursor correlation is quite a bit more involves and would reveal too much in-house code.

We will modify the documentation to clarify these points.

 

Best Regards,

Judy