[shahin1]

Hi everyone

I am very new to modeling reaction in ANSYS fluent and I can really use any help and guide (even very basic) you can tell me regarding my problem.

I have to simulate a reaction (electrochemical reaction). It is basically a pipe in which CO2 is flown and on the walls it reacts with H+ ions and electron to form formic acid in liquid form.

From the studies I had I got the following notes (please correct me if I have some errores:

1. I have to use surface reaction since my reaction only happens on the walls

2. I have to use a UDF since it is a heterogeneous reaction

and I have these question:

1.As I do not have any knowledge of C, how long it would take me to learn sufficient C programming to write a UFD?

2. The H+ hydrogen ions are in liquid solution with a specific concentration, is it possible to incorporate it in ansys?


sorry if my question is very basic and maybe wrong, please feel free to give me any information or even simpler solution (even if not very accurate) to this problem.
Thanks in advance

[vinerm]

Fluent has inbuilt modeling capability for electrochemical reactions. You don't need a UDF, until and unless the inbuilt capability doesn't suit your requirement, which doesn't appear to be the case. You have to enable Species Transport, then Volumetric Reactions, and as soon as you enable the latter, Wall and EC reactions show up. Just enable those, provide material and reaction kinetics, and you're good to go.

[shahin1]

Originally Posted by vinerm

Fluent has inbuilt modeling capability for electrochemical reactions. You don't need a UDF, until and unless the inbuilt capability doesn't suit your requirement, which doesn't appear to be the case. You have to enable Species Transport, then Volumetric Reactions, and as soon as you enable the latter, Wall and EC reactions show up. Just enable those, provide material and reaction kinetics, and you're good to go.

Thanks a lot!
I will definitely go for it, but as my reaction happens on the surface of the pipe (basically they are electrodes, will volumetric reaction be suitable?

[vinerm]

You can have EC reaction at the wall.