The steady-state version of FlowlinePro uses the steady-state part of the FlowRegimeEngine to calculate two- or three-phase flow. It determines flows, velocities, pressures, temperatures, volume fractions, flow regimes and all other relevant parameters for single flowlines. The graphical user interface (GUI) also contains an automatic report generator. A simple example of such a report can be found here.
The video shows an example of how it can be used for steady-state flow.
A stable network solver is also available, but not integrated in the GUI. The network solver uses a modified Newton-iteration method to produce results very fast.
The transient solver uses implicit integration with automatic time step control. The standard version comes with all calculation modules, including the slug tracking module. The transient version of FlowlinePro has to be integrated into third-party software’s graphical user interface; it does not have its own. Both the steady-state and transient versions can read data directly from PVTsim-generated property tables.
FlowlinePro can of course simulate singlephase liquid or gas flow, too. A purely singlephase version of FlowlinePro is also available to those who do not need the multiphase capabilities.
The single-phase version is particularly well suited to simulate long gas transport pipelines, as described in these two videos. It calculates heat exchange with its environment, something which is crucial to accuracy for gas pipelines. FlowlinePro can simulate single pipelines, networks, buried-pipes, partly buried pipes and many other configurations. The first video below shows a steady-state simulation of Zeepipe, one of the world’s longest subsea export pipelines. The second video demonstrates transient simulations of the same line.