[ancolli]

My BC is as follow (for a scalar in laplacianFoam)

dT/dx=f(T,T0) (where f is nonlinear and T0 is unknown)

I solved the problem with groovyBC when T0 is known, applying N-R (Tn+1=Tn-function(Tn,T0)). it is working.

Now my problem is how to set T0 where is unknown (how to tell to groovyBC an started guessed value?
Thank u

[rapierrz]

Hi Alejandro,

You can define this parameter in variables section in groovyBC.

[ancolli]

but how?
If i define T0 in variables, for example

T0=5; Eq 1.
T0=T0+ f; Eq 2.

Where f depends of flux in the last iteration.
will use for all iterations T0=5 in eq 2.
I need T0 in the right of eq. 2 to be T0 of the left for the last iteration