Thermodynamics for multi-component CO₂ mixtures
Since the CO₂ stream involves several impurities, reliable thermodynamic models for multi-component CO₂ mixtures are required. Existing commercial simulation tools are not able to provide correct thermodynamic information for such mixtures. Inaccuracy in thermodynamic models can result in inaccurate process simulation and inaccurate estimates of energy consumption, and often in overestimated water solubility.

The objectives of this task are:

• To develop and analyse new models/parameters for the CO₂ mixtures with components that have been identified as critical for the behaviour of the CO₂ stream during  transport and injection
• Provide the flow model with the necessary thermodynamic functions and properties so that it can handle multi-component CO₂ mixtures i.e. develop a robust interface between the flow and thermodynamic models

PhD project:

• Candidate: Mohamed Ibrahim
• Project start: April 2011
• Working title: Thermodynamics and transport properties for CO₂ mixtures
• Supervisor: Ivar S. Ertesvåg
• Co-supervisor: Geir Skaugen 

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Fluid dynamics for CO₂ transport and injection
The objective is to analyse and improve existing models for one-dimensional multi-component two-phase flow regarding their applicability to the case of CO₂ transport and injection.

Research topics:

• Assessment of multi-component two-phase flow models
• Flow-regime modelling

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Numerical methods for compressible multi-component two-phase flow
The objective is to solve the mathematical models under study in an accurate, robust and efficient way, including transient phenomena, such as pressure and volume-fraction waves.

Research topics:

• Explicit schemes for the multi-component drift-flux model
• Exploration of the applicability of implicit or semi-implicit schemes to the current model and application.
• Heat-transfer models

PhD project:

• Candidate: Halvor Lund
• Project start: September 2010
• Working title: Models and numerical methods for CO₂ pipeline transport
• Supervisor: Bernhard Müller
• Co-supervisors: Tore Flåtten and Svend Tollak Munkejord

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