[newGuyAtCFD]

interFoam is a solver for 2 incompressible, isothermal immiscible fluids using a VOFmethod.

The pressure is defined as:

dimensions      [1 -1 -2 0 0 0 0]

Instead of the kinematic pressure seen in incompressible solvers:

dimensions      [0 2 -2 0 0 0 0];

In the damBreak tutorial, the pressure has a uniform value of 0. When I run the case I get negative values [-11]. What does this mean? -11 Pa in relation to atm pressure?

[amirhosseintaran]

Greetings,

interFoam works with a p_rgh, which includes the hydrostatic contribution,
so p_rgh = p - rho*gh;

Altough i didnt understand your question, but hope this helps.
Bests,

[newGuyAtCFD]

Originally Posted by amirhosseintaran

Greetings,

interFoam works with a p_rgh, which includes the hydrostatic contribution,
so p_rgh = p - rho*gh;

Altough i didnt understand your question, but hope this helps.
Bests,

If you run the dambreak tutorial you will see negative values of p_rgh. What does it mean? -x Pa bellow some reference value?

[Tobermory]

Originally Posted by newGuyAtCFD

If you run the dambreak tutorial you will see negative values of p_rgh. What does it mean?

It means that the value of p_rgh is less than zero! You can manipulate the value of p_rgh (eg make it positive, or make it equal the static pressure at a certain location) by simply choosing a different reference height, hRef.

[Alczem]

I think interFoam needs p_rgh to take the hydrostatic effetcs into account, but it does not need "realistic" values for the pressure, simply gradients. I may be wrong though!