[Dune] Partitioning and weights in dune-alugrid

[Andreas Dedner]

Hi
Have you taken a look at
       http://arxiv.org/pdf/1407.6954v2.pdf
for example the explanation in the second half of page 20?

Furthermore dune-alugrid contains an example directory with a few 
subdirectories, e.g., loadbalance
which contains example showing how to use the extended interface.

Greetings
Andreas

On 06/08/15 16:25, Alexander Kissinger wrote:
> Dear Dune,
>
> I am running parallel simulations using dumux together with 
> dune-alugrid and Metis (METIS_PartGraphRecursive) for partitioning 
> (only static load balancing is required).
> I noticed that the shape of the partitions has a strong impact on the 
> convergence behavior of my linear solver. Since my problem has 
> heterogeneous material parameters and everything works very well for 
> the homogeneous case, I thought of passing weights for each element 
> (for example permeability distribution) to the partitioning method.
> I had a look in dune-alugrid/dune/alugrid/3d/grid.hh and saw the method:
>     bool loadBalance ( LBWeights &weights, CommDataHandleIF< 
> DataHandleImpl, Data > &dataHandleIF )
> which seems to fit for that purpose.
>
> My questions are:
>
> - Are there any examples I could look at where weights are passed to 
> this method?
> - Do Metis, ParMetis or the internal load balancing methods support 
> these user assigned weights?
> - What does the type LBWeights look like, a vector with the size 
> numElements?
>
> Thanks!
>
> Best regards
> Alex
>