[vishal3]

hello everyone!!!

I am trying to simulate a 2D bubble column (Case: Hills, 1974, Radial Non uniformity of velocity and voidage in the bubble column) with same column dimensions as of Hills. Here I have attached the case files (I cud not upload polymesh folder from constant directory because of high memory. Rest all the files are attached from constant directory.). I have applied setFields for geometry as mentioned in the setFieldDict in folder system. I have simulated this case for Superficial gas velocity (VG) = 19mm/s. I have attached result for Axial Liquid Velocity (U2Mean).

2D Geometry Details:: 0.139(X) x 0.0005(Y) x 1.38(Z).
Mesh is generated in GMSH open source.
Also attached .geo file for mesh.

It has been observed that the magnitude of axial liquid velocity (Z-direction) is maximum in the region where water is not available (refer setFieldDict). How is this possible? Can anybody help me to make it correct?

[GerhardHolzinger]

The governing equations of twoPhaseEulerFoam (momentum equation) are formulated in the phase-intensive form. This leads to non-zero velocities in regions where the corresponding phase is not present, as in your case.
This is discussed in several threads in this forum and it is explained as a consequence of the phase-intensive formulation.