Hi Rob,
\nThanks for the great suggestions.
\nI decreased the particle time step from 0.0001s to 0.00002s. And the splashing is turned off. Also, the DPM domain is unticked. The error message now seems simpler than before, but the solution still blows off after 25 iterations as shown in the following:
\nIt looks like the problem is in solving for the Eulerian wall film models by checking the huge residual of it. And the problem of turbulence quantities remains. The problem of a huge DPM parcel number is eliminated, I suppose it means most parcels are generated by splashing…
\n———————————————————————————————————————————————————————————————————————————————————————-<\/p>\n
Advancing DPM injections ….<\/p>\n
Reversed flow on 956 faces (8.5% area) of pressure-outlet 12.<\/p>\n
Reversed flow on 6391 faces (24.0% area) of pressure-outlet 13.<\/p>\n
Reversed flow on 6832 faces (86.7% area) of pressure-outlet 14.
\nsub-iteration: 1 residual – h: 0.000000e+00; u: 0.000000e+00; v: 0.000000e+00; t: 0.000000e+00
\nFilm time = 2.000000e-03 with timestep = 1.0e-04, (max_cfl: 0.000000e+00)
\nInjecting 25 particle parcels with mass 2e-08
\nnumber tracked = 275
\nInjecting 25 particle parcels with mass 2e-08
\nnumber tracked = 300
\nInjecting 25 particle parcels with mass 2e-08
\nnumber tracked = 325
\nInjecting 25 particle parcels with mass 2e-08
\nnumber tracked = 350
\nInjecting 25 particle parcels with mass 2e-08
\nnumber tracked = 375
\nInjecting 25 particle parcels with mass 2e-08
\nnumber tracked = 400
\nEulerian wall film particles:
\nabsorbed = 13
\nInjecting 25 particle parcels with mass 2e-08
\nnumber tracked = 412
\nEulerian wall film particles:
\nabsorbed = 24
\nInjecting 25 particle parcels with mass 2e-08
\nnumber tracked = 413
\nEulerian wall film particles:
\nabsorbed = 26
\nInjecting 25 particle parcels with mass 2e-08
\nnumber tracked = 412
\nEulerian wall film particles:
\nabsorbed = 27
\nInjecting 25 particle parcels with mass 2e-08
\nnumber tracked = 410
\nEulerian wall film particles:
\nabsorbed = 27<\/p>\n
…………………………………………………………………………………………………………………………………………………………………………………………………….
\nturbulent viscosity limited to viscosity ratio of 1.000000e+05 in 187343 cells
\n244.6249e-047.3816e-021.2243e-026.3270e-021.2860e+065.6663e-011.0639e+005:11:14 19976<\/p>\n
Reversed flow on 3235 faces (33.1% area) of pressure-outlet 12.<\/p>\n
Reversed flow on 8237 faces (57.1% area) of pressure-outlet 13.<\/p>\n
Reversed flow on 5250 faces (67.6% area) of pressure-outlet 14.
\ntemperature limited to 1.000000e+00 in 513405 cells on zone 10 in domain 1
\ntemperature limited to 5.000000e+03 in 436656 cells on zone 10 in domain 1
\nsub-iteration: 1 residual – h: 1.976365e+12; u: 1.926994e+13; v: 8.212897e+12; t: 1.544663e+87
\nsub-iteration: 2 residual – h: 1.492813e+12; u: 6.872916e+12; v: 5.264992e+12; t: 5.808624e+87
\nsub-iteration: 3 residual – h: 1.102153e+12; u: 1.924995e+13; v: 8.212897e+12; t: 6.931355e+87
\nsub-iteration: 4 residual – h: 1.103431e+12; u: 6.872916e+12; v: 5.264992e+12; t: 5.808624e+87
\nsub-iteration: 5 residual – h: 1.103234e+12; u: 1.924995e+13; v: 8.212897e+12; t: 6.931355e+87
\nsub-iteration: 6 residual – h: 1.103234e+12; u: 6.872916e+12; v: 5.264992e+12; t: 5.808624e+87
\nsub-iteration: 7 residual – h: 1.103234e+12; u: 1.924995e+13; v: 8.212897e+12; t: 6.931355e+87
\nsub-iteration: 8 residual – h: 1.103234e+12; u: 6.872916e+12; v: 5.264992e+12; t: 5.808624e+87
\nsub-iteration: 9 residual – h: 1.103234e+12; u: 1.924995e+13; v: 8.212897e+12; t: 6.931355e+87
\nsub-iteration: 10 residual – h: 1.103234e+12; u: 6.872916e+12; v: 5.264992e+12; t: 5.808624e+87
\nFilm time = 2.193750e-03 with timestep = 6.3e-06, (max_cfl: 9.051277e+05)
\nMaximum CFL reached. Reduce time step by factor of 2<\/p>\n
turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 257258 cells
\n254.9143e+008.5547e-039.2232e-042.5725e-036.8090e+594.7955e+071.5337e+005:09:00 19975<\/p>\n
Reversed flow on 10219 faces (47.4% area) of pressure-outlet 12.<\/p>\n
Reversed flow on 11966 faces (73.9% area) of pressure-outlet 13.<\/p>\n
Reversed flow on 5496 faces (71.4% area) of pressure-outlet 14.
\nStabilizing temperature to enhance linear solver robustness.
\nStabilizing temperature using GMRES to enhance linear solver robustness.<\/p>\n
Divergence detected in AMG solver: temperaturesub-iteration: 1 residual – h: 1.318278e+19; u: 6.973356e+17; v: 2.637542e+17; t: 6.959193e+88
\nsub-iteration: 2 residual – h: 1.320348e+19; u: 2.046648e+20; v: 2.037741e+20; t: 1.007706e+95
\nsub-iteration: 3 residual – h: 1.320801e+19; u: 6.973356e+17; v: 2.621847e+17; t: 1.212422e+101
\nsub-iteration: 4 residual – h: 1.320801e+19; u: 2.046648e+20; v: 2.037741e+20; t: 1.206597e+107
\nsub-iteration: 5 residual – h: 1.320801e+19; u: 6.973356e+17; v: 2.621847e+17; t: 9.390307e+112
\nsub-iteration: 6 residual – h: 1.320801e+19; u: 2.046648e+20; v: 2.037741e+20; t: 4.265750e+111
\nsub-iteration: 7 residual – h: 1.320801e+19; u: 6.973356e+17; v: 2.621847e+17; t: 1.152971e+109
\nsub-iteration: 8 residual – h: 1.320801e+19; u: 2.046648e+20; v: 2.037741e+20; t: 9.192200e+117
\nsub-iteration: 9 residual – h: 1.320801e+19; u: 6.973356e+17; v: 2.621847e+17; t: 5.623902e+123
\nsub-iteration: 10 residual – h: 1.320801e+19; u: 2.046648e+20; v: 2.037741e+20; t: 2.564501e+131
\nFilm time = 2.196875e-03 with timestep = 3.1e-06, (max_cfl: 4.516040e+12)
\nMaximum CFL reached. Reduce time step by factor of 2<\/p>\n
turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 932236 cells<\/p>\n
Divergence detected in AMG solver: temperature
\nDivergence detected in AMG solver: temperature<\/p>\n","protected":false},"template":"","class_list":["post-205780","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t