Sorry, I forgot to add my files. Kind regards, Tri Dat
2015-11-24 20:03 GMT+01:00 Tri Dat NGO <trida...@gmail.com>: > Hi Dumuxers, > > I would like to run parallel simulations of CO2 injection into a 3D > reservoir of which the horizontal extents are much higher than the > vertical one: Lx/Lz = Ly/Lz >> 1 (e.g. a reservoir of 1000m x 1000m x 50 > m). A 2p cell-centered model is used. > > The domain is described on a cartesian grid of 100x100x100 (1E+6) cells. The > CO2 is injected into the domain at X=500m and Y = 500m by using the > Peaceman's well model (bhp). The pressure at the boundaries perpendicular > to the Y-axis is set to the initial hydrostatic pressure. All others > boundaries are no-flux Neumann boundaries. At the first step, we consider, for > simplicity, an homogeneous reservoir. You can find in attachment the *.hh > files of my test. > > The simulation converges only if the reservoir is anisotropic (Kxx/Kzz = > Kyy/Kzz >>1), meaning that the medium is lowly permeable in Z-direction. > Nevertheless, when the domain is isotropic (Kxx = Kzz), a problem occurs: > Newton solver did not converge. The error message is "MathError > [mgc:/home/share/soft/dumux-2.6/include/dune/istl/paamg/amg.hh:825]: Coarse > solver did not converge". > > Moreover, the same test works correctly on isotropic but thicker domains (e.g. > 1000m x 1000m x 250 m, the grid is always of 100x100x100). > > I don't understand why a same test works on a grid but not on another > grid. Is this related to the numerical scheme (fully-implicit, > cell-centered)? > > Any help will be greatly appreciated! > > Kind regards, > Tri Dat >
ntdex108_tutorialproblem_coupled.hh
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ntdex108_tutorialspatialparams_coupled.hh
Description: Binary data
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