Accurate modeling of pipeline transport of gas requires a model that gives a good representation of the physics governing the fluid flow as well as good representation of how the system interact with the surroundings.
A model of the system means a good 1D representation that one can solve numerically. As such what approximations are valid in the operational area of a given pipeline? What numerical method should be used to ensure stability, accuracy and speed?
Representing the surroundings well involves accurately modeling the heat transfer between transport fluid and ambient, as well as having reliable data for ambient temperature and velocity.
Polytec’s Improved Flow Modelling Project aims at improving the state-of-the art of 1D pipeline models. Results from the project can be found in the following publications:
- J. F. Helgaker & T. Ytrehus – Coupling between Continuity/Momentum and Energy Equation in 1D Gas Flow – Energy Procedia (2012) 26 pp. 82-89.
- T. Ytrehus & J. F. Helgaker – Energy Dissipation Effect in the One-Dimensional Limit of the Energy Equation in Turbulent Compressible Flow – Journal of Fluids Engineering (2013) 135 (6) 061201.
- J.F. Helgaker, T. Oosterkamp & T. Ytrehus – Transmission of Natural Gas through Offshore Pipelines – Effect of unsteady heat transfer model – in MekIT´13. Seventh national conference on Computational Mechanics, Akademika forlag (2013) 325-333
The project is founded by Gassco AS and finances two PhD Candidates.