Fluxes through surface element
with normal vector
:
Mass transport
change of mass per time:
change of momentum per time
Energy transport and work done by pressure
change of total energy per time
Shear forces (friction) are ignored.
There are no torsional forces (only relevant in solids).
![\begin{displaymath}
\left[ \rho \ensuremath{\mathchoice{\mbox{\boldmath$\dis...
...$}}
{\mbox{\boldmath$\scriptscriptstyle n$}}}} \right] \; d\!A
\end{displaymath}](img35.png){kind=small}
![\begin{displaymath}
\left[ \rho e_{\rm ik}+ P\right] \ensuremath{\mathchoice{\m...
...tstyle n$}}
{\mbox{\boldmath$\scriptscriptstyle n$}}}} \; d\!A
\end{displaymath}](img36.png){kind=small}