Dear Timo,
thank you very much for the useful answers.
I want to clear my first question, please: Dumux has any linked software
interms of grid construction, visualisation, or pre/post-processing.
Like Hydro_AS2D has MapView to visualise its results.
Thank you in advance,
Sevinj
On 2022-04-21 10:16, Timo Koch wrote:
Dear Sevinj,
please always reply to the mailing list so that others can profit from
the answers too.
On 21. Apr 2022, at 08:36, sevinj.mammad...@stud.tu-darmstadt.de
wrote:
Dear Timo,
thank you very much. Your email and the links are very helpful. Yes, I
needed exactly 2D shallow water model. I have last feew questions
left. If you answer, I would be happy.
1. Is there any linked software with Dumux, (can be internal or
external)?
I don’t understand.
2. Is there any 1D/2D coupled model?
Not out-of-the-box. But this is possible in Dumux as model coupling is
an integral part in the design. Currently, there is no 1D shallow
water model. So this would have to be added.
I happen to be personally interested in the 1D-2D coupled model but I
can’t promise anything is going to be usable in the near future.
At this point consider this important advice:
Dumux often doesn’t provide an out-of-the-box solution to your
problem. This means you need to modify and add stuff according to your
needs.
Dumux is written (like Dune on which Dumux is based) using modern
heavily templated C++. This means you should be familiar with C++ or
at least willing to invest quite some time learning C++.
There is admittedly a bit of a steep learning curve.
3. IS there Water Quality and Sedimentation models?
not that I know of.
4. I know that Dumux use implicit FD Method,
that’s not correct. The 2D shallow-water model uses a cell-centered
finite volume scheme (with Riemann solver for the numerical flux) for
the spatial discretisation.
The time discretisation can be explicit or implicit Euler, whatever
you choose, however you have to implement a CFL criterion for the time
step restriction yourself.
Higher order time discretization are in the making, but not available
in the current version and would require quite some effort to
implement.
but I did not find any info about Mesh Type, if it is structured or
unstructured.
Both structured and unstructured meshes are supported.
Also local adaptivity is possible, but again there is no
out-of-the-box solution for 2D shallow water.
You would need to implement a conservative mapping from one grid to
the other to transfer the solution and parameters yourself (there are
some helper and examples).
Best
Timo
I found broad info about State and Private Organisations which have
used/are using DUMUX as research purposes. Also about User Meetings,
which is wonderful.
Liebe Grüße,
Sevinj
On 2022-04-20 21:22, Timo Koch wrote:
Dear Sevinj,
welcome to the Dumux mailing list and happy to hear that you are
considering Dumux.
I’ll try to answer but it would be easier with more detail what you
are trying to achieve.
1. Parallelization is possible for many models, both distributed
memory parallelism with MPI and shared memory parallelism (several
backends and for the assembly in the newest version)
2. We don’t provide any special helpers for cloud computing but you
can of course run it in the cloud. The dependencies are very minimal
so it should be easy to install.
3. You would have to be more specific what kind of mathematical model
you are looking for. You can find an overview of available models
here: https://dumux.org/docs/doxygen/master/modules.html.
For instance a 2D shallow water model is available and there is an
example here
(https://git.iws.uni-stuttgart.de/dumux-repositories/dumux/-/tree/master/examples/shallowwaterfriction).
The SWE model has been successfully tested on HPC clusters.
The code is highly customisable build with the intention that almost
every piece can be swapped out for a custom implementation.
Best wishes
Timo
On 20. Apr 2022, at 14:57, sevinj.mammad...@stud.tu-darmstadt.de
wrote:
Dear DumuxDune staff,
I am a student at TU Darmstadt and I am doing research on 2D
software. In my list I added DumuxDune as well.
I would be happy if you clear some questions for me.
1. Parallelization in Dumux Dune( in the handdbook there is a bit
info but unclear).
2. Cloud Computing in DumuxDune.
3. If it will be used in flood modelling.
Thank you in advance,
Sincerely,
Sevinj
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