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## Re: Coupling equations

 From: Bourriche Lahoussaine Subject: Re: Coupling equations Date: Wed, 11 May 2022 16:29:35 +0200 (CEST)

Thank you
But what it bothers me is that this implementation is the same as
Laplace (A)+B+Laplace(B)+A=0 implementation's

Two things different with the same implementation

Cordialement

Lahoussaine BOURRICHE
3A, ENSEEIHT , Physique numérique
+33 6 20 76 17 12

De: "Tetsuo Koyama" <tkoyama010@gmail.com>
À: "Lahoussaine Bourriche" <lahoussaine.bourriche@etu.toulouse-inp.fr>
Cc: "getfem-users" <getfem-users@nongnu.org>
Envoyé: Mercredi 11 Mai 2022 16:23:59
Objet: Re: Coupling equations

Dear Bourriche

Thank you for reply.
I also think it works.

Best Tetsuo

2022年5月11日(水) 23:13 Bourriche Lahoussaine <lahoussaine.bourriche@etu.toulouse-inp.fr>:
Hy Tetsu
Thank you for your time.
I saw the link and it's far from what i have, my problem is kind of  :
Laplace(A) + B =0
Laplace(B) + A =0
I suggest :
#Equation 1 :
Add_non_lineair_term( " Weak form of ( Laplace(A)  ) )")
Add_lineair_term( " Weak form of B  )")
#Equation 2 :
Add_non_lineair_term( " Weak form of ( Laplace(B)  ) )")
Add_lineair_term( " Weak form of A  )")

I disscused this with mr. Renard and he is ok with it. What do you think you

Best Lahoussaine

Cordialement

Lahoussaine BOURRICHE
3A, ENSEEIHT , Physique numérique
+33 6 20 76 17 12

De: "Tetsuo Koyama" <tkoyama010@gmail.com>
À: "Lahoussaine Bourriche" <lahoussaine.bourriche@etu.toulouse-inp.fr>
Cc: "getfem-users" <getfem-users@nongnu.org>
Envoyé: Mercredi 11 Mai 2022 15:58:06
Objet: Coupling equations

`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`

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