Abstract
This paper reviews current research challenges related to the modelling of transient flow of multiphase CO2-rich
mixtures in pipes. This is relevant not only for events like startup,shutdown or planned or uncontrolled depressurization of pipelines, but also for normal operation, and therefore
needs to be taken into account by simulation tools employed for design and operation of CO2 pipelines. During transportation, CO2 will often be in a dense liquid phase, whereas e.g. natural gas is in a dense gaseous phase. This
requires special attention to depressurization and the possible propagation of cracks. In addition, we highlight and illustrate research challenges related to thermodynamics, and the modelling of the wave-propagation
velocity (speed of sound) for two-phase flows. Further, some relevant currently available simulation tools, and their applicability to CO2 transport, are briefly discussed.
mixtures in pipes. This is relevant not only for events like startup,shutdown or planned or uncontrolled depressurization of pipelines, but also for normal operation, and therefore
needs to be taken into account by simulation tools employed for design and operation of CO2 pipelines. During transportation, CO2 will often be in a dense liquid phase, whereas e.g. natural gas is in a dense gaseous phase. This
requires special attention to depressurization and the possible propagation of cracks. In addition, we highlight and illustrate research challenges related to thermodynamics, and the modelling of the wave-propagation
velocity (speed of sound) for two-phase flows. Further, some relevant currently available simulation tools, and their applicability to CO2 transport, are briefly discussed.