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reported mass flow differs from monitored mass flo

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Old   July 14, 2008, 13:51
Default reported mass flow differs from monitored mass flo
  #1
London
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Hello

I am running a simple simulation which includes an inlet and an outlet. I am monitoring the mass flow rate on a graph as well as the residuals.

Once the solution has converged the reported mass flow rate on report>surface integrals> inlet /outet etc is considerably higher than the values which were being plotted on the graph.

Which one is correct and why is this happening?

Thanks
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Old   July 15, 2008, 02:46
Default Re: reported mass flow differs from monitored mass
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BastiL
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Do you run solver and postprocessing both in double precision?
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Old   July 15, 2008, 04:13
Default Re: reported mass flow differs from monitored mass
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London
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Hello BastiL, I'm not sure what you mean when you say double precision?

Please explain?

Thanks
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Old   July 15, 2008, 08:19
Default Re: reported mass flow differs from monitored mass
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ravi kumar
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surface integrals at inlet and outlet is correct if ur net mass flow rate is zero.. or very near to zero...
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Old   July 17, 2008, 12:44
Default Re: reported mass flow differs from monitored mass
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jeremy
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When you start fluent ask for 2ddp (2 dimensions, double precision). If you used an old fluent version, writte

fluent 2ddp

on the terminal, good luck
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