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[Question #154551]: solution of one PDE as BC for the next

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From: Bento <question154551@xxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 28 Apr 2011 14:07:05 -0000
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New question #154551 on DOLFIN:
https://answers.launchpad.net/dolfin/+question/154551

Hi,

I want to solve two coupled PDEs on two different meshes. The meshes are
mesh_A = Rectangle(0, 0, 20, 1, 200, 1)
mesh_B = Rectangle(0, 0, 20, 5, 200, 10)

So they have the same length in x[0]-direction (actually mesh_A should be an interval, but time dependent plotting in dim 1 does not work at the moment). Now I would like to use the solution u_A that I computed on mesh_A as boundary condition on mesh_B on the boundary x[1] == 5. How can I achieve this? 
In the next time step I want to use the restriction of solution u_B to the boundary x[1]==5 as parameter in the PDE on mesh_A. How can I achieve this?

Thank you!

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