UDS Boundary Condition Question
 

Hi everyone,

I am currently writing UDS/UDFs to account for phenomena not present in fluent.

The problem I am having is the following:

After writing the equations, I want to specify a boundary condition on one direction of the UDS derivative, and not specific value.

Basically, supposing my UDS is based on a variable "A", how can I specify a boundary condition of dA/dx = 0 or dA/dn (normal) = 0?

Thank you for your help, I am still trying to get used to all this fluent user defined world

that conditions is there by default, isn't it?
uds flux = 0