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strange divergence when solving multiphase problem

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Old   July 27, 2006, 06:38
Default strange divergence when solving multiphase problem
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tanghao
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hi all! I am now struggling with a high-pressure gas-liquid multiphase problem. I found it strange than when the density of gas is set to constant, the solution can converge; while if i select IDEAL-GAS as it's density, the solution will diverge in one time step, and the pressure and temperature all exceed lower limits. I tried to adjust the lower limit to a reasonable number, but it seems didn't work!

Anyone could help me??
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Old   July 27, 2006, 07:39
Default Re: strange divergence when solving multiphase pro
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KP
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Check with your URFS. Try to tighten them.
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Old   July 27, 2006, 19:47
Default Re: strange divergence when solving multiphase pro
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tanghao
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Thanks for ur advice. you mean TIGHTEN them ? then which URF should be tightened?
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