FluidFlow includes eight two-phase correlation options to choose from. You can view and select a two-phase correlation by selecting:
Options | Calculation | Two Phase (Select the drop-down menu).
When you choose Whalley Criteria, the software automatically evaluates the fluid physical properties in the model and applies the appropriate correlation (of three) based on a set of criteria for mass flux, viscosity etc. There is further information in the Help file at:
Contents | Two Phase Flow Calculations | Modelling Approach.
Note, the software automatically generates a flow pattern map for each pipe in two-phase flow systems. You can view further details on this in the Help file at:
Contents | Components | Pipes | Results Charts – Pipes.
If you have a specific correlation requirement, please advise as we regularly add features to the program based on user requirements.