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May 4, 2007, 08:36 |
strange simulation error
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#1 |
Guest
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Hi!
I have a complex 3D simulation, that works very fine. It is a cooling simulation, so i set a temperature difference. With 300 - 350 K, 300-600 K, 300-750 K the simulation works fine!! BUT when I set the temp.-differnce to 300-770 K the "AMG solver error: Temperature" appears. And that hapens also for 300-800K, 300-900 K. So what happend???? An earlier simulation with 450-1300 works fine also. There are no UDFs, but temp. depending material data. But, as far as I see, there are no changes in the material properties at 750 K The simulation is ideal, incompressible gas, N2, turbulent flow with RNG k-e and ewt Wall function, flow about 10 m/s. Any idea??? Ralf |
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May 4, 2007, 09:47 |
Re: strange simulation error
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#2 |
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Hi,
now, that error appears... temperature limited to 5.000000e+03 in 8017 cells on zone 6 in domain 1 turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 518009 cells Error: cx-xy-append-data: invalid number (y) Error Object: nan |
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May 4, 2007, 14:02 |
Re: strange simulation error
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#3 |
Guest
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quite difficult to understand exactly by what your problem is caused. Quite normal the turbulent viscosity limit for earlier iterations. Quite strange the T limit: might be caused by not a good mesh. Where are those cells located? Try to under relax T and energy (and radiation). Let us know.
thomas |
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