Modelling and Numerical Simulation of Gas Migration in a Nuclear Waste Repository

Details Modelling and Numerical Simulation of Gas Migration in a Nuclear Waste Repository Modelling and Numerical Simulation of Gas Migration in a Nuclear Waste Repository

2010-06-15

arxiv.org/abs/1006.2914v1

Mathematics

Analysis of PDEs

Scientific paper

We present a compositional compressible two-phase, liquid and gas, flow model for numerical simulations of hydrogen migration in deep geological radioactive waste repository. This model includes capillary effects and the gas diffusivity. The choice of the main variables in this model, Total or Dissolved Hydrogen Mass Concentration and Liquid Pressure, leads to a unique and consistent formulation of the gas phase appearance and disappearance. After introducing this model, we show computational evidences of its adequacy to simulate gas phase appearance and disappearance in different situations typical of underground radioactive waste repository.

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