How do I access the normalized progress variable in an UDF?

- March 30, 2023 at 4:06 pm
  
  a.ortolani
  Subscriber
  
  Hi,
  I need to acces the normalized progress variable in my UDF while using a partially-premixed combustion model.
  I tried with C_PREMIXC(c,t), but this gives me the un-normalized value.
  Is there a way to access what I need? In alternative is there a way to access the equilibrium values of the un-normalized progress variable for a given mixture fraction so that I can normalize it myself?
  Thank you
  Andrea
- March 31, 2023 at 10:41 am
  
  Rob
  Ansys Employee
  
  It may be calculated internally, and I can't see anything in the manual so can't really help: it'd involve digging in the source code and I can't then share anything I (or rather a colleague who has access) find. However, https://ansyshelp.ansys.com/account/Secured?returnurl=/Views/Secured/corp/v231/en/flu_udf/flu_udf_DPMDEFINE.html shows where the macros are defined, so you may want to look in the header files.

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