gpflach Posted August 26, 2020 Share Posted August 26, 2020 thermo_phreeqc+SRS.tdat PortlanditeDissCarb_DIF.x1t This X1t model simulates carbonation of portlandite cement to calcite, followed by dissolution of calcite, due to fluid_1 at the left 'inlet' boundary being water equilibrated with CO2 at 1 atm. The right boundary is an 'outlet'. The simulation runs as expected in an advection-only or advection+diffusion mode. However, in diffusion-only mode the simulation becomes invariant after the 20 year point when calcite disappears from cell 0. The carbonation and dissolution fronts should move into other cells but have become frozen. I have tried many different numerical settings to no avail. Could you help with a diagnosis? Quote Link to comment Share on other sites More sharing options...
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