Wall-normal momentum transport¶

\[ \begin{align}\begin{aligned}\pder{\vel{1}}{t} = & \dmomadv{1}{1} \dmomadv{1}{2} \dmomadv{1}{3}\\& \dmomadvx\\& \dmompre{1}\\& \dmomdif{1}{1} \dmomdif{2}{1} \dmomdif{3}{1}\\& \dmomdifx\end{aligned}\end{align} \]