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HELP:error :Floating point error: invalid number when i drag coefficient udf was used

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Old   April 15, 2010, 09:28
Question HELP:error :Floating point error: invalid number when i drag coefficient udf was used
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Hi all,
I'm modeling gas-liquid two phase flow with eulerian model, at the beginning ,the simulation goes well,but when i load a drag coefficient, there is an error after about 50 steps calculation :
Floating point error: invalid number
Error Object: ()
I've tried to decrease the under relax factor, it seems not useful.what should i do?
Thank you for your answer in advance

Last edited by zoesjtuer; April 15, 2010 at 09:46.
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Old   September 3, 2010, 02:17
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Initiating the case with wrong conditions may lead to floating point error when the iterations start.

and also wrong boundary condition definition might cause the floating point error
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drag coefficient, error, gas-liquid fow, udf

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