[CIG-MC] ASPECT 2.0.0 released

[Rene Gassmoeller]

We are pleased to announce the release of ASPECT 2.0.0. ASPECT is the
Advanced
Solver for Problems in Earth's ConvecTion. It uses modern numerical
methods such
as adaptive mesh refinement, multigrid, and a modular software design to
provide a fast, flexible, and extensible mantle convection solver. ASPECT is
available from

                   https://aspect.geodynamics.org/

and the release is available from

        https://github.com/geodynamics/aspect/releases/tag/v2.0.0

This release includes the following changes:
- New: Newton solver and defect correction Picard iterations for nonlinear
  problems (for the Stokes system)
- Melt solver: Overhaul leading to improved performance and stability,
better
  integration with other plugins
- New: Material model with grain size evolution
- New: Boundary temperature plugin with evolving core-mantle boundary
  temperature based on the heat flux through the core-mantle boundary
- New: ASPECT can now compute the geoid in 3D spherical shell geometry
- New: Operator splitting for reactions between compositional fields
- New: Added a PREM gravity profile
- Improved: Significantly reduced memory consumption in models that use many
  compositional fields
- Improved: A large number of performance improvements for preconditioners,
  assembly, seismic tomography initial conditions, and lateral averaging
- Improved: More flexibility for boundary and initial conditions, different
  plugins can be combined
- Improved: The dynamic topography postprocessor now uses the consistent
  boundary flux method for computing surface stresses, which is
significantly
  more accurate
- New: Additional RHS force terms in the Stokes system can be added
- New particle interpolators: nearest neighbor, bilinear least squares,
  harmonic average
- New: Graphical user interface for the creation and modification of input
  parameter files
- Many other fixes and small improvements.
- Rework: Updated parameter and section names to make them more
consistent and
  easier to understand. A script for updating parameter and source files is
  provided with the release.

A complete list of changes can be found at
 
https://aspect.geodynamics.org/doc/doxygen/changes_between_1_85_80_and_2_80_80.html

Information about how to cite ASPECT can be found at
  https://aspect.geodynamics.org/cite.html
and
  https://geodynamics.org/cig/abc/?software=aspect&version=2.0.0

Wolfgang Bangerth, Juliane Dannberg, Rene Gassmoeller, Timo Heister,
Jacqueline Austermann, Menno Fraters, Anne Glerum, John Naliboff,
and many other contributors.

-- 
Rene Gassmoeller
https://gassmoeller.github.io/