QPAC is a general-purpose modelling tool for solving systems of partial differential and algebraic equations. It is used to provide a comprehensive mathematical modelling consultancy service, addressing a wide range of problems including those with strongly coupled nonlinear processes. The flexibility and power of QPAC allow it to be applied to a wide array of problems, as demonstrated by the collection of peer-reviewed publications and white papers listed below.
For a comprehensive overview of the capabilities of QPAC and the design philosophy behind it, together with examples of its use in the fields of energy and the environment, please download the QPAC Overview Report.
The following is a selection of peer-reviewed publications and white papers on coupled nonlinear modelling problems where QPAC has been applied:
- Systems analysis of field and laboratory experiments considering impacts of CO2 leakage in terrestrial systems. Energy Procedia vol 37, 3394-3402 (2013).
- Analysis of hydro-mechanical processes in a ventilated tunnel in an argillaceous rock on the basis of different modelling approaches. Journal of Rock Mechanics and Geotechnical Engineering vol 5, 1-17 (2013).
- Reactive and non-reactive transport modelling in partially water saturated argillaceous porous media around the ventilation experiment, Mont Terri. Journal of Rock Mechanics and Geotechnical Engineering vol 5, 44-57 (2013).
- Approaches for representing hydro-mechanical coupling between sub-surface excavations and argillaceous porous media at the ventilation experiment, Mont Terri. Journal of Rock Mechanics and Geotechnical Engineering vol 5, 85-96 (2013).
- Coupled hydro-mechanical-chemical process modelling in argillaceous formations for DECOVALEX-2011. Mineralogical Magazine, December 2012, vol 76(8), pp. 3131-3143 (2012).
- The long-term cement studies project: the UK contribution to model development and testing. Mineralogical Magazine, December 2012, vol 76(8), pp. 3445-3455 (2012).
- SR-Site Independent Modelling of Engineered Barrier Evolution and Coupled THMC: Contribution to the Initial Review Phase. Swedish Radiation Safety Authority (SSM) Report 2012:18 (2012).
- Assessment of Issues Relating to Pre-closure to Post-closure Gas Generation in a GDF. Quintessa Report QRS-1378ZP-R1 v3.0 to NDA RWMD, available from the NDA bibliography (2012).
- Analysis of Barrier Performance: Modelling of Copper Corrosion Scenarios with and without Buffer Erosion. Swedish Radiation Safety Authority (SSM) Report 2011:12 (2011).
- Investigation of Gas Generation and Resaturation Issues: Input to EC FORGE Project. Quintessa Report QRS-1378ZC-R2 v2.0 for NDA RWMD, available from the NDA bibliography (2011).
- Optimisation of Deep Geological Disposal of Graphite Wastes. Quintessa Report QRS-1378ZO-R1 v2.0 for NDA RWMD, available from the NDA bibliography (2011).
- Fully Coupled Modeling of Long Term Cement Well Seal Stability in the Presence of CO2. Energy Procedia 4:5162-5169 (2011).
- Testing Geochemical Models of Bentonite Pore Water Evolution Against Laboratory Experimental Data. Physics and Chemistry of the Earth 36:1817-1829 (2011).
- A Comparative Study of the Modelling of Cement Hydration and Cement-Rock Laboratory Experiments. Applied Geochemistry 26:1138-1152 (2011).
- Front Tracking using a Hybrid Analytical Finite Element Approach for Two-Phase Flow Applied to Supercritical CO2 Replacing Brine in a Heterogeneous Reservoir and Caprock. Transport in Porous Media 90:545-573 (2011).
- Natural Systems Evidence for the Alteration of Clay under Alkaline Conditions: an Example from Searles Lake, California. Applied Clay Science 47:72–81 (2010).
- Modelling Iron-Bentonite Interactions. Applied Clay Science 47:91-98 (2010).
- Modelling Coupled Processes in the Evolution of Repository Engineered Barrier Systems using QPAC-EBS. Swedish Radiation Safety Authority (SSM) Report 2010:25 (2010).
- An Evaluation of Models of Bentonite Pore Water Evolution. Swedish Radiation Safety Authority (SSM) Report 2010-12 (2010).
- Post-closure Performance Assessment: Consideration of a Co-located Geological Disposal Facility in the Safety Case. Quintessa Report QRS-1378P-R1 v2.1 for NDA RWMD, available from the NDA bibliography.
- Understanding Radionuclide Migration from the D1225 Shaft, Dounreay, Caithness, UK. MRS Proceedings 1193 (2009).
- Modelling the Fate of Carbon Dioxide in the Near-surface Environment at the Latera Natural Analogue Site. Energy Procedia 1:1879–1885 (2009).
- Independent Calculations for the SR-Can Assessment: External Review Contribution in Support of SKI’s and SSI’s Review of SR-Can. Swedish Nuclear Power Inspectorate (SKI) Report 2008-12 (2008).