The following topics will be discussed:
Homogeneous Model
For two-phase flow using the homogeneous model, expect memory requirements to increase by a factor of 1.5 and CPU time to increase by a factor of 1.7 over the same single-phase simulation. Enabling free surface does not significantly alter CPU or memory requirements.
Inhomogeneous Model
For two-phase flow using the particle or mixture models, expect memory requirements to increase by a factor of 2.15 and CPU time to increase by a factor of 2.25. Enabling free surface does not significantly alter CPU or memory requirements.
N-Phase Flow
As the number of fluids increase, expect memory and CPU requirements to increase approximately linearly for small N. Tetrahedral meshes have more of a linear increase than hexahedral meshes. The table below gives approximate memory increase factors for up to 5 phases when compared to the same single-phase simulation on a hexahedral mesh.
| # of Phases | Memory Increases | |
|---|---|---|
| (Hex Mesh) | (Tet Mesh) | |
| 1 | 1 | 1.80 |
| 2 | 2.15 | 3.40 |
| 3 | 3.50 | 5.70 |
| 4 | 5.15 | 8.05 |
| 5 | 7.00 | 10.60 |
Expect the CPU factor to be slightly less than the corresponding memory factors, but the trend is the same.