UDF
 

I'm a neophite user of Fluent... I'd like to get a particulate BNC.. in fact I'm using the User Defined Scalar Module to modelize the concentration (C) of O2 in a liquid (dissolved O2). I've Navier Stokes equations and UDS (diffusion/convection) equation to solve. I'd like a particular boundary condition....

dc/dn=0 (as a symmetry condition) but u.n not equal zero.

So I do not know how to gat it. I wonder if I have to set a Velocity inlet condition with a UDF BNC for the Scalar (dc/dn=0) ..

what do you think..

thanks a lot if someone might help me