SubPhase.cpp : "pressure_drop" - "force_mag" about lbpm

[JamesEMcClure]

I believe that the LBPM Domain object will remove layers at the inlet if an external boundary condition is applied. See line 1407 from common/Domain.cpp

https://github.com/OPM/LBPM/blob/master/common/Domain.cpp

This should also be visible in the output data. The reason this is done is that the presence of solid can influence the value of the pressure and/or flux that would need to be set (since the interfacial forces would also need to be accounted for).

It is possible that a pressure / flux BC will "work" without removing these layers, but I expect that it would reduce the range of stability for the core flooding protocol.

There are internal data structures that store the pore sites along a face, since these are used in the communication structures. These correspond to the values that need to be sent / recieved by the MPI communications, and could be used within this context if necessary.

[Ricardoleite]

Thank you for your attention, Professor James McClure,

Regarding our discussion about the inlet position of "Pressure (Nx * Ny + Nx + 1)", I would like to emphasize the importance of correcting line 419. It is crucial to accurately account for the relative permeability in this correction.

419         double pressure_drop = (Pressure(Nx * Ny + Nx + 1) - 1.0) / 3.0;

In the equation above "/3.0" is outside of the parenthesis dividing the "Pressure(Nx * Ny + Nx + 1)". The correct form should be represented by:

419         double pressure_drop = (Pressure(Nx * Ny + Nx + 1) - 1.0/ 3.0);

Also, if possible, please take a look at the other issue I submitted (#85). You might have missed it