Boundary conditions of two body contact

The graphical user interface of Elmer
Post Reply
dmitry
Posts: 53
Joined: 09 Dec 2014, 16:52
Antispam: Yes
Location: Russia

Boundary conditions of two body contact

Post by dmitry »

Hi, dear Elmer users!
I want to ack a question about Boundary conditions of two body contact in Heat equation. As we know, Its expression is:
λ1(dT/dx)= λ2 (dT/dx)
where λ1 and λ2 heat conductivity of first and second body respectively.

How to assign this contition in Elmer? Is assignation heppens automaticaly or I should do it while pre-processing?

I don't found this information in ElmerModelsManual. It describes only k(dT/dx)= a(T -Text) it's not that I want.
raback
Site Admin
Posts: 4812
Joined: 22 Aug 2009, 11:57
Antispam: Yes
Location: Espoo, Finland
Contact:

Re: Boundary conditions of two body contact

Post by raback »

Hi, this is the natural BC for internal boundaries so no need to do anything. -Peter
dmitry
Posts: 53
Joined: 09 Dec 2014, 16:52
Antispam: Yes
Location: Russia

Re: Boundary conditions of two body contact

Post by dmitry »

Thank you!
dmitry
Posts: 53
Joined: 09 Dec 2014, 16:52
Antispam: Yes
Location: Russia

Re: Boundary conditions of two body contact

Post by dmitry »

Hi! It's me again.
Who can give me an explanation of "heat gap" condition? I'm interested in mathmatical formulation of it.
As I understand, Heat gap govern by heat transfer coeff. An I right?
Whether it means, that k(dT/dx)= a(T -Text) condition is used in this case? Where Text is temperature of neighbour body?
raback
Site Admin
Posts: 4812
Joined: 22 Aug 2009, 11:57
Antispam: Yes
Location: Espoo, Finland
Contact:

Re: Boundary conditions of two body contact

Post by raback »

Yes, and this is symmetric so that for the other side it is opposite. -Peter
dmitry
Posts: 53
Joined: 09 Dec 2014, 16:52
Antispam: Yes
Location: Russia

Re: Boundary conditions of two body contact

Post by dmitry »

Thanks! I started to use this programm 3 weeks ago, but it's really friendly for users and other users are friendly for me!!! Great appreciations for developers!
Post Reply