.. _discrete_scalar:

################
Scalar transport
################

The scalar is defined at each cell center and follows

.. math::

   \pder{\scalar}{t}
   =
   &
   \dscalaradv{1}
   \dscalaradv{2}
   \dscalaradv{3}

   &
   \dscalardif{1}
   \dscalardif{2}
   \dscalardif{3}.