[petsc-users] How to change PC content during Iterations

[behzad baghapour]

This means to PCDestroy() and then PCCreate again at that iteration?


On Mon, Oct 31, 2011 at 2:32 PM, Matthew Knepley <knepley at gmail.com> wrote:

> On Mon, Oct 31, 2011 at 10:58 AM, behzad baghapour <
> behzad.baghapour at gmail.com> wrote:
>
>> I did it but received this Error when I want to change the level of fill
>> for PCILU:
>>
>
> Right, you would have to recreate the preconditioner. The SetType() would
> not work since
> you did not actually change the type.
>
>    Matt
>
>
>> [0]PETSC ERROR: --------------------- Error Message
>> ------------------------------------
>> [0]PETSC ERROR: Object is in wrong state!
>> [0]PETSC ERROR: Cannot change levels after use!
>> [0]PETSC ERROR:
>> ------------------------------------------------------------------------
>>
>>
>>
>>
>> On Mon, Oct 31, 2011 at 2:19 PM, Matthew Knepley <knepley at gmail.com>wrote:
>>
>>> On Mon, Oct 31, 2011 at 8:55 AM, behzad baghapour <
>>> behzad.baghapour at gmail.com> wrote:
>>>
>>>> Dear all,
>>>>
>>>> I'm using KSP iteration (for now) to solve my nonlinear problem and
>>>> handling Newton Iterations manually. Here I want to change the PC method
>>>> from some specified KSP iteration. How should I do it correctly in Petsc?
>>>>
>>>
>>> Call PCSetType() and then KSPSetOperators() again in your loop
>>>
>>>    Matt
>>>
>>>
>>>> Thanks, B.B.
>>>>
>>>> --
>>>> ==================================
>>>> Behzad Baghapour
>>>> Ph.D. Candidate, Mechecanical Engineering
>>>> University of Tehran, Tehran, Iran
>>>> https://sites.google.com/site/behzadbaghapour
>>>> Fax: 0098-21-88020741
>>>> ==================================
>>>>
>>>>
>>>
>>>
>>> --
>>> 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
>>>
>>
>>
>>
>> --
>> ==================================
>> Behzad Baghapour
>> Ph.D. Candidate, Mechecanical Engineering
>> University of Tehran, Tehran, Iran
>> https://sites.google.com/site/behzadbaghapour
>> Fax: 0098-21-88020741
>> ==================================
>>
>>
>
>
> --
> 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
>



-- 
==================================
Behzad Baghapour
Ph.D. Candidate, Mechecanical Engineering
University of Tehran, Tehran, Iran
https://sites.google.com/site/behzadbaghapour
Fax: 0098-21-88020741
==================================
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