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Introduction
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.. index:: Waiwera

What is Waiwera?
================

Waiwera is a parallel, open-source geothermal flow simulator. It features:

* numerical simulation of high-temperature subsurface flows, including robust phase changes
* parallel execution on shared- or distributed-memory computers and clusters
* use of `PETSc <https://petsc.org/>`_ (Portable Extensible Toolkit for Scientific Computation) for parallel data structures, linear and non-linear solvers, etc.
* standard file formats for input (`JSON <http://www.json.org/>`_) and output (`HDF5 <https://portal.hdfgroup.org/display/HDF5/HDF5>`_, `YAML <http://www.yaml.org/about.html>`_)
* structured, object-oriented code written in Fortran 2003
* free, open-source license

Waiwera was developed at the University of Auckland's `Geothermal Institute <http://www.geothermal.auckland.ac.nz/>`_. Initial development was part of the "Geothermal Supermodels" research project, funded by the NZ Ministry of Business, Innovation and Employment (`MBIE <http://www.mbie.govt.nz/>`_), with additional support from `Contact Energy Ltd <https://contact.co.nz/corporate>`_.

.. index:: Waiwera; name

What does the name mean?
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The word *Waiwera* comes from the Māori language and means "hot water".

.. index:: Waiwera; license

Licensing
=========

Waiwera is open-source software, released under the GNU `Lesser General Public License <https://www.gnu.org/licenses/lgpl-3.0.en.html>`_ (LGPL) version 3.