Ansys Learning Forum › Forums › Discuss Simulation › Fluids › Explicit VOF vs Implicit VOF for Laser Melting? › Reply To: Explicit VOF vs Implicit VOF for Laser Melting?
July 23, 2021 at 8:36 pm
Dubey92
Subscriber
The solution is converging. But there are two things happening in between.
Reversed flow at N faces on pressure outlet. Sometimes this comes and then goes away. I read about it and learnt that it should not decrease the accuracy of the solution and sometimes flow reversal can take place in the domain. Is this true?
There was a warning coming for sometime. "Warning: Invalid Cp(0.000000 J/Kg.K) for steel at 20.00 K". But I have initialized the solution with whole domain at 300 K and the temperature can never reach so low. This warning was there for sometime but then the temperature in the warning kept on increasing and then warning was gone. Can you please tell how such a low temperature could be reached?
I have defined Cp using a UDF for temperature above room temperature(293 K). I am more surprised how temperature can reach such a low value as 20 K.
Reversed flow at N faces on pressure outlet. Sometimes this comes and then goes away. I read about it and learnt that it should not decrease the accuracy of the solution and sometimes flow reversal can take place in the domain. Is this true?
There was a warning coming for sometime. "Warning: Invalid Cp(0.000000 J/Kg.K) for steel at 20.00 K". But I have initialized the solution with whole domain at 300 K and the temperature can never reach so low. This warning was there for sometime but then the temperature in the warning kept on increasing and then warning was gone. Can you please tell how such a low temperature could be reached?
I have defined Cp using a UDF for temperature above room temperature(293 K). I am more surprised how temperature can reach such a low value as 20 K.
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