reported mass flow differs from monitored mass flo

July 14, 2008, 14:51

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

July 15, 2008, 03:46

Do you run solver and postprocessing both in double precision?

July 15, 2008, 05:13

Hello BastiL, I'm not sure what you mean when you say double precision?

Please explain?

Thanks

July 15, 2008, 09:19

surface integrals at inlet and outlet is correct if ur net mass flow rate is zero.. or very near to zero...

July 17, 2008, 13:44

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

July 14, 2008, 14:51	reported mass flow differs from monitored mass flo	#1
London Guest Posts: n/a	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

July 15, 2008, 03:46	Re: reported mass flow differs from monitored mass	#2
BastiL Guest Posts: n/a	Do you run solver and postprocessing both in double precision?

July 15, 2008, 05:13	Re: reported mass flow differs from monitored mass	#3
London Guest Posts: n/a	Hello BastiL, I'm not sure what you mean when you say double precision? Please explain? Thanks

July 15, 2008, 09:19	Re: reported mass flow differs from monitored mass	#4
ravi kumar Guest Posts: n/a	surface integrals at inlet and outlet is correct if ur net mass flow rate is zero.. or very near to zero...

July 17, 2008, 13:44	Re: reported mass flow differs from monitored mass	#5
jeremy Guest Posts: n/a	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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