Abstract
Simulation of coupled chemical reactions and fluid flow in porous sedimentary basins over long time periods is a numerical challenge. Most models representing such a physical problem are solved as PDEs where efficient timestepping with controlled error is difficult. We use the differential algebraic equation system approach where robust adaptive timestepping algorithms are available in the solvers, e.g., RADAU5 and DASSL. Mathematical and numerical models for coupled chemical reactions and fluid flow are derived. The models have several interesting properties, e.g., strong nonlinearities and stiffness, which are discussed. We test the performance of our code.
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Holstad, A. Modelling subsurface coupled chemical reactions and fluid flow over long time periods. Numerical Algorithms 19, 95–110 (1998). https://doi.org/10.1023/A:1019102406258
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DOI: https://doi.org/10.1023/A:1019102406258