On Sat, Oct 6, 2012 at 10:47 PM, Alan <span dir="ltr"><<a href="mailto:zhenglun.wei@gmail.com" target="_blank">zhenglun.wei@gmail.com</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<div>Dear Dr. Brown, <br>
Thanks for your reply and sorry for confusing you. <br>
I was trying to ask if there is an alternative way that I can
replace the DMDACreate3d in /src/ksp/ksp/example/tutorials/ex45.c
with something from outside of the PETSc (i.e. HYPRE).
DMDACreate3d generates a 3D Cartesian grid with uniform grid size.
However, I'm trying to import a local refined grid from outside of
the PETSc (i.e. HYPRE) to replace this 3D Cartesian grid with
unifrom grid size. Is there any examples for me to refer?<br></div></div></blockquote><div><br></div><div>Do we have automatic support for this? No. You could of course just use the Vec/Mat interface, but</div><div>
it sounds like a lot of coding on your part. I plan to do this eventually by specifying the data layout over</div><div>the grid using PetscSection. However, the really important question here is, what do you need from the</div>
<div>grid? If you don't need topological queries, just make the Vec/Mat and be done with it. If you do (which</div><div>I imagine), then you need to be specific about what you need.</div><div><br></div><div> Matt</div>
<div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div bgcolor="#FFFFFF" text="#000000"><div>
thanks,<br>
Alan<br>
<br>
</div>
<blockquote type="cite">Run any example with -pc_type hypre. I'm not sure what
you're asking for.<br>
<br>
<div class="gmail_quote">On Sat, Oct 6, 2012 at 8:04 PM, Alan <span dir="ltr"><<a href="mailto:zhenglun.wei@gmail.com" target="_blank">zhenglun.wei@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear Folks,<br>
I hope you're having a nice day.<br>
I'm trying to couple HYPRE with PETSc in order to use PETSc
solvers to<br>
obtain solutions (Poisson Equation) with local refined grid
from HYPRE.<br>
Is there any examples in PETSc that I can refer? or is there
any<br>
examples in PETSc which introduce such a way that the Matrix
is imported<br>
from external software rather than generated by PETSc.<br>
<br>
thanks,<br>
Alan<br>
<br>
</blockquote>
</div>
<br>
</blockquote>
<br>
</div>
</blockquote></div><br><br clear="all"><div><br></div>-- <br>What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>
-- Norbert Wiener<br>