[petsc-users] SNES update solution vector

[Bikash Kanungo]

Hi Matt,

I want to update the Dirichlet boundary condition on the solution vector
on-the-fly. One way to do it is to destroy the current snes solver and
create a new one with the new Dirichlet boundary condition (which means
setting a new solution vector with a different size, size  = # of
non-Dirichlet rows). But is it possible to work with the current snes and
instead enforce the new Dirichlet boundary condition on the current
solution vector?

Thanks,
Bikash

On Fri, Nov 3, 2017 at 5:19 PM, Matthew Knepley <knepley at gmail.com> wrote:

> What do you want to do to it?
>
>   Matt
>
> On Fri, Nov 3, 2017 at 5:14 PM, Bikash Kanungo <bikash at umich.edu> wrote:
>
>> Hi,
>>
>> I'm trying to solve a nonlinear problem using BFGS Quasi-Newton solver. I
>> would like to tamper the solution vector x on-the-fly, based on some
>> criterion. Is there a way to do so? Will SNESGetSolution(SNES snes, Vec *
>> x) allow me to do so for each SNES iteration?
>>
>> Thanks,
>> Bikash
>>
>> --
>> Bikash S. Kanungo
>> PhD Student
>> Computational Materials Physics Group
>> Mechanical Engineering
>> University of Michigan
>>
>>
>
>
> --
> 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
>
> https://www.cse.buffalo.edu/~knepley/ <http://www.caam.rice.edu/~mk51/>
>



-- 
Bikash S. Kanungo
PhD Student
Computational Materials Physics Group
Mechanical Engineering
University of Michigan
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