Predicting the behavior of a multiphase system, even in steady state, is complex. These changes make liquid and solid hydrate formation probable, 2 in turn creating an unsteady pressure profile in the pipe. 1 Frictional loss, elevation change, Joule-Thomson effect, and heat exchange between the pipe and its surroundings lead to pressure and temperature changes. In the movement of natural gas through pipes, the associated pressure and temperature of the fluid flow are subject to change throughout the pipe. Pressure-drop predictions can vary greatly depending on the software used. Gas flow rate can affect liquid holdup and thus pressure-drop prediction. Pipesim, however, does not reliably predict pressure drop at low natural gas flow rates and should be matched with field data to ensure accurate predictions. ![]() Olga software can be used to simulate multiphase pipeline flow at a wide range of rates without the need to match results to field data.
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