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- - **Why 3D solid-pore geometry showing diverged solution?**
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Why 3D solid-pore geometry showing diverged solution?Hello everyone,
I am using solidDisplacement solver for 3D solid-pore cube geometry. Following are displacement D boundary conditions: boundaryField { electron_minX { type tractionDisplacement; traction uniform ( 0 0 0 ); pressure uniform 0; value uniform (0 0 0); } electron_maxX { type tractionDisplacement; traction uniform ( 0 0 0 ); pressure uniform 0; value uniform (0 0 0); } electron_minY { type tractionDisplacement; traction uniform ( 0 10 0 ); pressure uniform 0; value uniform (0 0 0); } electron_maxY { type tractionDisplacement; traction uniform ( 0 -10 0 ); pressure uniform 0; value uniform (0 0 0); } electron_minZ { type tractionDisplacement; traction uniform ( 0 0 0); pressure uniform 0; value uniform (0 0 0); } electron_maxZ { type tractionDisplacement; traction uniform ( 0 0 0 ); pressure uniform 0; value uniform (0 0 0); } electron_to_pore { type tractionDisplacement; traction uniform ( 0 0 0 ); pressure uniform 0; value uniform (0 0 0); } electron_to_npore { type zeroGradient; } } OpenFOAM simulation is giving diverge solution. Following is part of log file: GAMG: Solving for Dx, Initial residual = 0.0407966, Final residual = 0.00378547, No Iterations 1 GAMG: Solving for Dy, Initial residual = 0.0521521, Final residual = 0.00500495, No Iterations 2 GAMG: Solving for Dz, Initial residual = 0.0856927, Final residual = 0.00255286, No Iterations 2 Min/Max/Ave DEqn:(-7.00897e+65 -2.76576e+77 -1.2423e+65) (7.19343e+65 -2.76576e+77 1.17129e+65) (1.36111e+64 -2.76576e+77 -2.05129e+64) GAMG: Solving for Dx, Initial residual = 0.030862, Final residual = 0.0010546, No Iterations 2 GAMG: Solving for Dy, Initial residual = 0.0446989, Final residual = 0.00435236, No Iterations 3 GAMG: Solving for Dz, Initial residual = 0.069533, Final residual = 0.00225699, No Iterations 2 Min/Max/Ave DEqn:(-6.97373e+65 -2.76576e+77 -1.2305e+65) (7.17125e+65 -2.76576e+77 1.07291e+65) (1.47816e+64 -2.76576e+77 -2.09031e+64) GAMG: Solving for Dx, Initial residual = 0.0282657, Final residual = 0.000732531, No Iterations 2 GAMG: Solving for Dy, Initial residual = 0.0351312, Final residual = nan, No Iterations 1000 GAMG: Solving for Dz, Initial residual = 0.0653158, Final residual = 0.00194052, No Iterations 2 Min/Max/Ave DEqn:(-6.92125e+65 nan -1.19559e+65) (7.11257e+65 nan 1.03401e+65) (1.54778e+64 nan -2.09798e+64) I have done similar 3D cube geometry problem without pore in which got converge solution. But I do not know why similar boundary conditions are not giving converge solution for solid-pore 3D cube geometry. I have also tried OpenFOAM-ext but similar problem is coming. When I am using three symmetry planes I get converge solution but when I am taking all surfaces as solution domain I get diverge solution. How I can get converge solution with considering all surfaces of the 3D cube (solid-pore phase) geometry? Does someone has any idea why this problem is coming? How I can solve this problem? Best regards, Sangeeta |

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