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Convergency of solution

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Old   February 3, 2010, 05:04
Default Convergency of solution
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Panos
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Hello fluent users
I simulate flow and heat transfer for air stream in a cylinder with heated walls. I try solve the problem and even when my solution seem converged, the outlet massweighted static temperature is not stable as you can see on the diagram below.
After 2000 iterrations i use descretization second order upwind for energy as it is recommended by the users manual and i reduce the under-relaxation factor for energy to 0,8.
The mass flow report seems satisfying
Mass Flow Rate (kg/s)
-------------------------------- --------------------
airin 0.0020031099
outlet -0.00200311
---------------- --------------------
Net -1.2356829e-10

I want your opinion if my simulation is converged.
Thanks
Attached Images
File Type: jpg scaled residuals.jpg (36.9 KB, 33 views)
File Type: jpg massweighted average.jpg (29.9 KB, 27 views)
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convergence, flow, fluent, heat


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