Dear DuMuXers,

we are happy to announce that the 2.8 version of DuMuX is now available.

Hopefully you profit from the changes. We recommend to change to the
current version.
You can download the tarball from
http://www.dumux.org/download/dumux-2.8.0.tar.gz

Alternatively, and particularly if you want to develop within the DuMuX
module directory,you can svn-checkout the release branch:

svn checkout --username=anonymous --password=''
svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/branches/release-2.8 dumux

Below you find the most important changes:

* IMPORTANT NOTES:
- DuMuX 2.8 is expected to run based on either Dune 2.3 or Dune 2.4. However, no attempt has been made to fix the warnings arising from the deprecation of EntityPointer in Dune 2.4. This will be made during the next release cycle. Moreover, using the multidomain models based on Dune 2.4 is currently only possible by patching dune-multidomaingrid. See test/multidomain/README for
    details.

* DELETED BUILD SYSTEM: The Autotools based build system was removed, use the
  CMake based build system as it is default since Dune 2.4.

* IMPROVEMENTS and ENHANCEMENTS:
- New fully-implicit porous-media models for two fluid phases that may consist
    of an arbitrary number of components have been added. The basic one is
associated with the property TwoPNC, see test/implicit/2pnc. A more advanced one that incorporates solid-fluid phase changes is indicated by TwoPNCMin,
    see test/implicit/2pncmin.

- The implicit cell-centered models now can use adaptive grid refinement. To make a test problem adaptive, just set the property AdaptiveGrid to true and
    choose corresponding indicators via AdaptionInitializationIndicator and
AdaptionIndicator, see test/implicit/2p/lensproblem.hh for an example. So far, indicators are only provided for the TwoPModel. Indicators for other models will be provided in the future, as well as parallelization and box
    discretization.

- With the CpGridCreator, a grid creator has been introduced that reads from a Petrel output / Eclipse input file and generates a CpGrid that is offered by the OPM module dune-cornerpoint. The fully-implicit cell-centered models are
    now able to deal with cornerpoint grids. See
test/implicit/2p/test_cc2pcornerpoint for a test of the functionality. A realistic corner-point grid will be provided in dumux-lecture soon. The OPM modules need to be patched to be compatible with Dune's CMake based build
    system, see patches/README for details.

  - Zero equation turbulence models (zeroeq) have been added as new models
    to the freeflow folder. Tests for coupling a turbulent free flow using
    zeroeq turbulence models with flow in a porous medium have been added.

  - A new class GridCreator is now the new standard grid creator replacing
DgfGridCreator. It comprises all functionality from the DgfGridCreator (see
    also immediate interface changes), plus the ability to read gmsh, or to
build a structured grid (only with Dune 2.4) by merely changing the input
    file.

  - Multidomain problems can now be run by using the general start routine,
just as most other problems. For this, the constructor of the multidomain problems has been changed and the InterfaceMeshCreator has been replaced by
    the InterfaceGridCreator, see below.

- The Richards model has now an additional flag useHead, which can be used to
    switch between a pressure-saturation and a pressureHead-watercontent
formulation. The primary variables are either pressure in [Pa] or pressure
    head in [cm], respectively. Default is useHead = false. See
    test/implicit/richards for details.

  - A bug in the diffusion term in the freeflow models has been fixed.

- A lot of work has been devoted to improving the testing environment, adding
    new tests, restructuring the handbook and improving the documentation.

See the file CHANGELOG for more detailed information.



Whenever using DuMuX, we appreciate if you cite the first paper listed at
http://www.dumux.org/publications.php


Have a lot of fun and best regards,
Nicolas (DuMuX 2.8 release manager)

--
_____________________________________________________________________

Dr.-Ing. Nicolas Schwenck
University of Stuttgart
Department of Hydromechanics and Modelling of Hydrosystems

Pfaffenwaldring 61                           phone: +49 711 685 64736
GER-70569 Stuttgart                          fax:   +49 711 685 60430

            email:[email protected]
                url:www.hydrosys.uni-stuttgart.de

_____________________________________________________________________

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