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Fluctuating residuals in transient simulation (transientSimpleFoam)

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Old   November 17, 2011, 18:18
Default Fluctuating residuals in transient simulation (transientSimpleFoam)
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Robin Gilbert
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Hello everyone,

I modified the transientSimpleFoam to add a temperature equation and tried to run a case of t-junction from pimpleFoam tutorial with the exact same boundary conditions. The residuals I get, fluctuate a lot as shown in the figure:

The fvScheme is as follows:
https://rapidshare.com/files/784318946/fvSchemes

fvSoultion is as follows:
https://rapidshare.com/files/889178775/fvSolution

The boundary conditions are exactly same as that in pimpleFoam case with T at inlet =400K and everywhere else is 300K.
Why is there so much fluctuation in the residuals??

Thank you
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Old   November 17, 2011, 20:36
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Robin Gilbert
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Hello everyone,

I figured out that I was plotting residuals incorrectly. My bad. Sorry!!
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