Scalar transportΒΆ
The scalar is defined at each cell center and follows
\[ \begin{align}\begin{aligned}\pder{\scalar}{t}
=
&
\dscalaradv{1}
\dscalaradv{2}
\dscalaradv{3}\\&
\dscalardif{1}
\dscalardif{2}
\dscalardif{3}.\end{aligned}\end{align} \]
The scalar is defined at each cell center and follows