Derivative fluent CO
 

Hi, I would to know how to obtain the derivative of a mass concentration of CO, In particular I i'm interested to obtain the dCO/dx in Fluent.
Thank you

Species Mass Fraction Derivative
 

Do you want these for post-processing or do you want to access these in a UDF? For post-processing, just issue the following command in Fluent and then run at least 1 iteration. Then, these will be available in Contours, Vectors, etc. Do note that these are available only within Fluent and not in CFD-Post (in case you are using Workbench).

(rpsetvar 'species/save-gradients? #t)