.. _InputsRegions:

Region definitions
==================

Regions are used to define sections of the domain.  They may be either boxes, planes or points.  They are used in defining initial and boundary conditions.

+--------------------------+-----------------------------------------------------------------------+-------------+-----------+
|                          | Description                                                           |   Type      | Default   |
+==========================+=======================================================================+=============+===========+
| mfix.regions             | Names given to regions.                                               | Strings     | None      |
+--------------------------+-----------------------------------------------------------------------+-------------+-----------+
| regions.[region_name].lo | Low corner of physical region (physical, not index space)             |   Reals     | 0 0 0     |
+--------------------------+-----------------------------------------------------------------------+-------------+-----------+
| regions.[region_name].hi | High corner of physical region (physical, not index space)            |   Reals     | 0 0 0     |
+--------------------------+-----------------------------------------------------------------------+-------------+-----------+

Below is an example for specifying two regions.

.. code-block:: none

   mfix.regions  = full-domain   riser

   regions.full-domain.lo = 0.0000  0.0000  0.0000
   regions.full-domain.hi = 3.7584  0.2784  0.2784

   regions.riser.lo       = 0.0000  0.0000  0.0000
   regions.riser.hi       = 0.1000  0.2784  0.2784
