Dear all,
I catch the occasion to greeting you the best wishes for Christmas and
holidays!
I understand this may not be the best moment for questions, but maybe
not for everybody is Xmas ;)
Since I got interesting results with DuMux 2.12 in the study of viscous
fingers, I was asked to investingate further the effects of the presence
of polymeric contaminant in the water phase.
The model to be used, as I understand (correct me if I'm wrong), should
be 2p2c, where p=water/oil and c=water/contaminant(polymer).
To account for adsorption, it is assumed that phase number 1 (aqueous
phase) is divided by essentially two mixed fractions (mass or molar to
be used?) - water and polymer:
S_1 = S_1 * c_p + S_1 * (1 - c_p) where c_p is the concentration of the
polymer in water. The dependence of the adsorption (Gamma) is provided
in tabular form: Gamma = f (c_p).
I'm reading the tests/tutorials about this, and I'm wondering:
1) how to introduce the "polymer" contaminant in water? Should I create
"my phase/component" fluidsystem? Which file should I use as template?
2) Mass or molar concentrations are adopted of doesn't matter as soon as
they are correctly converted?
Thank you,
Best wishes and Happy New Year,
Lorenzo
On 21.12.2018 16:32, Timo Koch wrote:
We happily and proudly announce today's release of DuMuX 3.0!
You may get the new release via git
git clone -b releases/3.0
https://git.iws.uni-stuttgart.de/dumux-repositories/dumux.git
or you can download the tarball at
https://git.iws.uni-stuttgart.de/dumux-repositories/dumux/-/archive/3.0.0/dumux-3.0.0.tar.gz
DuMuX 3.0 is a major version update. It is not backward compatible in
all aspects to 2.12. The following minor version updates will be, as
before for the DuMuX 2-series, always backward compatible to at least
the last minor version update. DuMuX 3.0 is based on Dune 2.6 and is
expected to run with the current Dune master.
The tutorial has been replaced by the new module `dumux-course` which
is accessible at
https://git.iws.uni-stuttgart.de/dumux-repositories/dumux-course. We
recommend new users and also users experienced with DuMuX 2.X to clone
the course and have a look at the exercises in there.
There are numerous improvements and enhancements. On the general side,
there are, among many others:
- New style main files: The sequence of simulation steps was
linearized, meaning that each step is visible in the program's main
file. In the new main files, one can clearly see the io,
initialization, assembly, solving, update, time loop, etc., of the
program. This renders it possible to customize the program flow to the
individual needs in a much easier and much more transparent way.
- Property system and runtime parameters: All macros have been
replaced by native C++!
- TypeTag templates: In order to avoid unnecessary dependencies and
allow to share class instantiations between problems using different
TypeTags, we replaced the single TypeTag parameter by a small number
of specific template arguments for many classes. On the surface, this
is visible in the SpatialParams classes. , We encourage everyone to
avoid TypeTag as a template argument for class templates, apart from
the top problem class.
- Assembly: The assembler can now assemble implicit and explicit Euler
time discretizations.
In terms of models, physics and methods, also a lot has happened, of
course all to the better. A small subset is:
- MPFA schemes: The new core comes with a framework for MPFA schemes,
in which currently the only available scheme is the MPFA-O scheme. It
can be used in conjunction with any DuMuX model and also works on
surface grids.
- Box-dfm: The `2pdfm` model from version 2.12 has been generalized
such that it can be used on any DuMuX model and in both two and three
dimensions.
- Tracer transport: A new model for tracer transport with a given flow
field has been added. The model can be also used to implement
sequentially coupled simulations, or iterative solvers where flow and
transport are decoupled / weakly coupled.
- Mineralization: An adapter model for mineralization has been added
and can be used with all porousmediumflow models. A balance for the
solid volume fraction of precipitating, adsorbed, or absorbed
substances is added to the existing equations.
- Multidomain: DuMuX 3.0 introduces a new multidomain framework which
does no longer depend on `dune-multidomain` and can be used for the
coupling of an arbitrary number of subdomains. The sub-domains can be
regions in which different sets of equations are solved and/or which
have different dimensionalities.
- Free-flow models: The previous Navier-Stokes model using the box
method has been replaced by one that employs a staggered grid
discretization. The new method does not require any stabilization
techniques
A more extended list of changes and more detailed explanations are
provided at
https://git.iws.uni-stuttgart.de/dumux-repositories/dumux/blob/master/CHANGELOG.md.
We would be very happy to help you with migrating your code. To this
end, have a look at
https://git.iws.uni-stuttgart.de/dumux-repositories/dumux/wikis/Updating-programs-from-version-2.12-to-version-3.0.
Thanks to Zenodo, the release can (and should) be cited as:
Koch, T., Gläser, D., Weishaupt, K., Ackermann, S., Beck, M., Becker,
B., Burbulla, S., Class, H., Coltman, E., Fetzer, T., Flemisch, B.,
Grüninger, C., Heck, K., Hommel, J., Kurz, T., Lipp, M., Mohammadi,
F., Schneider, M., Seitz, G., Scholz, S. and F. Weinhardt. DuMuX
3.0.0. https://doi.org/10.5281/zenodo.2479595.
See also the BibTex entry below.
On the behalf of all developers, I wish you all the best using DuMuX
3.0, merry christmas and a happy new year!
Timo
@misc{koch_timo_2018_2479595,
author = {Koch, Timo and
Gläser, Dennis and
Weishaupt, Kilian and
Ackermann, Sina and
Beck, Martin and
Becker, Beatrix and
Burbulla, Samuel and
Class, Holger and
Coltman, Edward and
Fetzer, Thomas and
Flemisch, Bernd and
Grüninger, Christoph and
Heck, Katharina and
Hommel, Johannes and
Kurz, Theresa and
Lipp, Melanie and
Mohammadi, Farid and
Schneider, Martin and
Seitz, Gabriele and
Scholz, Simon and
Weinhardt, Felix},
title = {DuMuX 3.0.0},
month = dec,
year = 2018,
doi = {10.5281/zenodo.2479595},
url = {https://doi.org/10.5281/zenodo.2479595}
}
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