[H...G]

Hi,

I am modeling a multi physic problem using chtmultiregionfoam in Openfoam. there are two solid regions in my problem and both thermal and electric equations should be solved. currently, I'm learning how to improve the solver with electric equation. But I have no idea to set the boundary condition at the interface of the regions. the following B.C. should be defined :

Q(at region 1)=Q(at region 2)

Q(at region 2)=-K*grad(T)
Q(at region 1)=-K*grad(T)+s*sigma*T*(grad(v)+s*grad(T))

s,k and sigma are constant; T an v are temperature and electric potential field.

the main trouble is to define the term (s*sigma*T*(grad(v)+s*grad(T))) at boundary which is not included in openfoam intrinsic boundary conditions.

I will be really grateful if anyone can help me.

[piu58]

I don't know your problem / your question. But I recommend separating the physics and split into two or three simulations, each for every physical effect. Normally, that is much more stable and therewith, much more accurate.

[H...G]

Thank you for your response,

But the governing equations are coupled and can not be solved separately. fortunately, I found the method of defining equations; However the coupled boundary condition at the interface of the regions is still the problem!!!

[JeremyChvlr]

Hello,

I have the same problem, did you manage to fix it?


Jeremy