[dune-pdelab] some problems in dune

[Rebecca de Cuveland]

Hey,

could you also give us the output of your code? Sometimes the calculation depend on the installed software on ones computer…
Thanks,

Rebecca
Am 30.10.2014 um 15:18 schrieb Robert Jendrny <Robert.Jendrny at math.tu-dortmund.de>:

> Hi again,
> 
> maybe the fully code would be more helpful ;-)
> 
> All the files which end with "_orig.hh" are the original ones from the course which I changed in the files with missing '_orig'
> 
> Cya
> Robert
> 
> On 10/30/2014 03:14 PM, Robert Jendrny wrote:
>> Hi Rebecca,
>> 
>> thank you for your answer ...
>> 
>> I am working with the code from pdelab exercise2, example02 (Dune course this year - 2014)
>> I hope the attached files are enough
>> 
>> The most important file is example02_Q1.hh, there everything is calculated
>> I want to solve Poisson (-Laplace(u) = 1) on unit square with AMG
>> 
>> For Q1 I nearly get independent numbers of iterations for mesh size h, h/2, h/4,.... which is fine
>> 
>> But If I change Q1 to Q2, the numbers of iterations "explode" if the mesh gets finer and finer
>> 
>> Maybe someone can fix it ;-)
>> 
>> Bye,
>> Robert
>> 
>> On 10/30/2014 03:00 PM, Rebecca de Cuveland wrote:
>>> Hey Robert,
>>> perhaps you can show us your program and output? (verbosity 3 or 4 for AMG and 1 for linear solver)
>>> AMG is quite sensible for the used options. I only use Q1, but as far as I know Q2 should also work...
>>> Bye,
>>> Rebecca
>>> 
>> 
>> 
> 
> 
> -- 
> Robert Jendrny
> B.Sc. Technomathematik
> 
> TU Dortmund, Fakultät für Mathematik
> LS III: Angewandte Mathematik und Numerik
> M 1020, Vogelpothsweg 87, 44227 Dortmund
> robert.jendrny at math.tu-dortmund.de
> 
> <pdelab-exercise2-sol.zip>