System of Units
===============

MFIX-Exa adopts the International System of Units (SI). Simulations have to be
set up accordingly. In the following table we provide a list of some of the
physical quantities we can specify in the input file and their corresponding
units.

+--------------------------------+-----------------------------------------+
| Physical quantity              | MFIX-Exa SI unit                        |
+================================+=========================================+
| amount of substance            | mole [:math:`mol`]                      |
+--------------------------------+-----------------------------------------+
| length                         | meter [:math:`m`]                       |
+--------------------------------+-----------------------------------------+
| mass                           | kilogram [:math:`kg`]                   |
+--------------------------------+-----------------------------------------+
| time                           | second [:math:`s`]                      |
+--------------------------------+-----------------------------------------+
| force                          | Newton [:math:`N`]                      |
+--------------------------------+-----------------------------------------+
| temperature                    | Kelvin [:math:`K`]                      |
+--------------------------------+-----------------------------------------+
| pressure                       | Pascal [:math:`Pa`]                     |
+--------------------------------+-----------------------------------------+
| energy                         | Joule [:math:`J`]                       |
+--------------------------------+-----------------------------------------+
| power                          | Watt [:math:`W`]                        |
+--------------------------------+-----------------------------------------+
| density                        | [:math:`kg \cdot m^{-3}`]               |
+--------------------------------+-----------------------------------------+
| velocity                       | [:math:`m \cdot s^{-1}`]                |
+--------------------------------+-----------------------------------------+
| dynamic viscosity              | [:math:`Pa \cdot s`]                    |
+--------------------------------+-----------------------------------------+
| diffusivity                    | [:math:`m^2 \cdot s^{-1}`]              |
+--------------------------------+-----------------------------------------+
| specific heat capacity         | [:math:`J \cdot kg^{-1} \cdot K^{-1}`]  |
+--------------------------------+-----------------------------------------+
| thermal conductivity           | [:math:`W \cdot m^{-1} \cdot K^{-1}`]   |
+--------------------------------+-----------------------------------------+
| spring coefficient             | [:math:`N \cdot m^{-1}`]                |
+--------------------------------+-----------------------------------------+
| molecular weight               | [:math:`kg \cdot mol^{-1}`]             |
+--------------------------------+-----------------------------------------+
| heat of formation              | [:math:`J \cdot kg^{-1}`]               |
+--------------------------------+-----------------------------------------+
| reaction rate (Euler-Euler)    | [:math:`mol \cdot m^{-3} \cdot s^{-1}`] |
+--------------------------------+-----------------------------------------+
| reaction rate (Euler-Lagrange) | [:math:`mol \cdot s^{-1}`]              |
+--------------------------------+-----------------------------------------+