17.5 MultiFluid
The multiFluid implementation of the equation of state is meant to complement the volume-of-fluid (VOF) hydrodynamics solver for capturing material interfaces described in sec:vof. The EoS operates as previously described for any cells that are purely a single fluid. In mixed cells the EoS is called separately on each of the components, here labelled by , for the state
. After a call to the EoS it is possible that
. In order to maintain the mechanical equilibrium assumed in VOF the volume fractions, need to be relaxed until the two pressures equilibriate. First an average pressure is computed,
|
(17.27) |
and the component fluid states are adjusted as
|
|
(17.28) |
|
|
(17.29) |
|
|
(17.30) |
|
|
(17.31) |
In the above
is the adiabatic index for fluid as in other EoS implementations,
|
(17.32) |
An equivalent single fluid state may also be parameterized in mixed cells as