For constant density problems the system of equations can be simplified. The incompressible solvers transform the pressure from static pressure, \(p_s\) [pa] to kinematic pressure \(p_k\), i.e.
\[p_k = \frac{p_s}{\rho} \qquad \mathrm{[m^2/s^2]}\]Note that the kinematic pressure has the name p
in OpenFOAM solvers, the
same as the name for the static pressure p
. Accordingly, to interpret the
results from incompressible solvers, the kinematic pressure should be multiplied
by the reference density (constant) value.