Results Labels Interpretation

[ahmedsrizk95]

I was wondering what is the difference between krw and krwf also between krn and krnf in the timelog.csv results file?

Many thanks

[JamesEMcClure]

The difference is krnf "measures" the flow that is occurring in films, whereas krn accounts for all of the flow in the system. See void SubPhase::Basic() from https://github.com/OPM/LBPM/blob/master/analysis/SubPhase.cpp for the implementation. In this case, "films" are defined based on flow that occurs within 2 voxels of the solid surface, which is based on the interfacial thickness in the color model. In a well-resolved system we usually expect that flow in the films will be small compared to the overall flow.

In a typical situation krn, krw correspond to the quantities that you would care about for relative permeability.

[ahmedsrizk95]

Thanks Dr. for your clarification. Can I also know what is the unit of the resulting permeabilities?