hello, SOS I am working on pem fuel cell, I writing udf to fluent ,I have some problem with udf and boundary conditions.I really need help from all you. who you simulate pem fuel cell ? waiting for the reply thanks

can u explain excatly what problem are u facing???

thanks to the reply I don know what is the source terms in fuel cell module in fluent. problem is : 1) fuel cell 2.2 manual dont introduce momentum,mass,species source terms. do you know source terms ? or do you have any reffrence to source terms or b.c. in fluent module ?

2) I write udf but electrical potential equation dont converge to the reason that nonlinear source terms.(J_a or J_c)exponential terms in butler-volmer equation be very larg as magnitude of upper 10^30.

3) I dont know how do I simulate membrane in udf ? how do I set membrane boundary conditionin udf ?

thanks alot sincerely

[elemad1987]

guess what happenHistory repeat it self.

I have the same problem as you

I am using the Fluent 14 and I want to simulate a PEM fuel cell.
The only tutorial of PEM fuel cell of Fluent is from 6.3 version.
I use it to Fluent 14 and I follow the steps but the results does not the same, also some data and parameters are different.

Anybody know if the tutorial of 6.3 Fluent is working to Fluent 14 too?
I think now you had finish your thesis peacefully.
Can you help me to overcome my problems.
or send me your cas files.

Thank you
Emad G.
elemad1987@gmail.com