Coupling equations

[Tetsuo Koyama]

Dear Bourriche Lahoussaine

> When i have two coupling equation, how getfem knows that I m working on the 

> first equation /second equation, in other words 

> How getfem will knowz which term to put in which equation 

> 

> Add_lineair (first equation)

> Add_lineair (second equation)

We have to combine bricks to variables which is define by MeshFem object.

GetFEM builds tangent matrix on each variable.

This tutorial might helps you.

https://getfem.org/tutorial/thermo_coupling.html

Best Tetsuo