Thank you for your reply.

MeshFunction seems to manage the whole equation_systems. I wonder if there
is any simpler operation that can transfer only the solutions between two
different meshes? (with different partition, if possible).  And a cube
domain is enough for me.

I wrote a routine that transfers the solutions between two nested meshes
that one is uniformly refined from another (the refined mesh has the same
partition as the coarse mesh).
For some reason, I want the refined mesh to be denser than the coarse one
only along a particular direction, if libMesh provides another refining
operation similar to 'uniformly_refine()', then my code doesn't need to be
changed.

Best,
Li


On Wed, Sep 11, 2019 at 5:55 PM Stogner, Roy H <royst...@ices.utexas.edu>
wrote:

>
> On Wed, 11 Sep 2019, Li Luo wrote:
>
> > I used MeshTools::Generation::build_cube to generate a cartesian mesh.
> > I wonder is there any tool to refine the mesh along a specific axis
> > direction? For example, only refine uniformly along the z-axis.
>
> If you want to do it *uniformly*, on a cube, you can generate a new
> mesh with the increased resolution in that one direction, then use
> MeshFunction to project data from old mesh to new.
>
> If you want to do it adaptively, or on more general domains, you're
> out of luck.  This is something we've wanted to be able to do for years
> but we've got isotropic refinement assumptions too deeply held in too
> many places in the code.
> ---
> Roy
>


-- 

Postdoctoral Fellow
Extreme Computing Research Center
King Abdullah University of Science & Technology
https://sites.google.com/site/rolyliluo/

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