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June 14, 2019, 04:51
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Divergence during spray
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#1 |
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New Member
arash
Join Date: Aug 2009
Posts: 29
Rep Power: 17  |
I simulate direct injection engine with heptane fuel. Abnormally during injection I see this message :
Advancing DPM injections .... number tracked = 56244, escaped = 0, aborted = 0, trapped = 0, evaporated = 416, incomplete = 0, incomplete_parallel = 0, coalesced = 981, shed = 980, splashed = 800 Deleted 5 particles in injection injection-2 with total mass 2.472363e-15 kg iter continuity x-velocity y-velocity z-velocity energy k epsilon c8h18 o2 time/iter 5220 5.1076e-03 1.4374e-05 1.8945e-05 3.2820e-05 9.9820e-08 1.7801e-04 8.7904e-06 6.7227e-04 3.1561e-07 0:18:25 40 Stabilizing pressure coupled to enhance linear solver robustness. Experiencing convergence difficulties - temporarily relaxing and trying again... Experiencing convergence difficulties - temporarily relaxing and trying again... Experiencing convergence difficulties - temporarily relaxing and trying again... Experiencing convergence difficulties - temporarily relaxing and trying again... Stabilizing pressure coupled to enhance linear solver robustness. Experiencing convergence difficulties - temporarily relaxing and trying again... Divergence detected in AMG solver: pressure coupled Stabilizing k to enhance linear solver robustness. Divergence detected in AMG solver: k Stabilizing epsilon to enhance linear solver robustness. Divergence detected in AMG solver: epsilon Stabilizing species-0 to enhance linear solver robustness. Divergence detected in AMG solver: species-0 Stabilizing species-1 to enhance linear solver robustness. Divergence detected in AMG solver: species-1 Stabilizing temperature to enhance linear solver robustness. Divergence detected in AMG solver: temperature WARNING: Invalid cp (0.000000e+00 J/kgK) for n-octane-air at temperature 1.#QNAN0 K Warning: Mass_Diffusivity: invalid (zero) diffusivity. Please check material properties. Error at host: floating point exception Error at Node 0: floating point exception Error: floating point exception Error Object: #f I realy don't know what happend? |
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June 25, 2019, 05:21
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#2 |
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Member
Join Date: Mar 2009
Location: Vietnam
Posts: 36
Rep Power: 18 |
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Linear Mode
