[petsc-users] jacobians for multicomponent problems

[domenico lahaye]

Would the same work for non-structured problems, for instance for power flow equations? 

Thx. Domenico Lahaye. 

      From: Matthew Knepley <knepley at gmail.com>
 To: Gideon Simpson <gideon.simpson at gmail.com> 
Cc: petsc-users <petsc-users at mcs.anl.gov> 
 Sent: Wednesday, June 24, 2015 5:05 AM
 Subject: Re: [petsc-users] jacobians for multicomponent problems
   
On Tue, Jun 23, 2015 at 7:52 PM, Gideon Simpson <gideon.simpson at gmail.com> wrote:

Suppose I have a problem for which the field variable has multiple components, in this case real and imaginary parts, and I have created a DM with two degrees of freedom.  When assembling a Jacobian associated with a nonlinear problem on this data, is there any data management accounting for the different components that makes this “easier?”

DMDA knows about components so that MatStencil has a .c slot for indices. Is that what you mean?
  Thanks,
    Matt

 
-gideon




-- 
What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.
-- Norbert Wiener

  
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