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Channel flow with symmetry Plane not symmetric

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Old   May 19, 2017, 23:32
Default Channel flow with symmetry Plane not symmetric
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Hilbert
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Dear Foamers,

For some LES simulations I am trying to generate an inflow condition by means of running a half channel with a symmetry condition.

I am running PimpleFoam for the runs. in the direction were there is no symmetry condition the flow profile looks good. I attached a plot of Umean.

In the direction of the symmetry plane the results are a bit weird. The maximum flow velocity is not on the symmetry plane as one would expect but off center. I attached an other plot of the distribution.

The channel is reasonably small, 7x4x70 mm. On the forum I found that playing with the number of correctors in the pimple settings could help. Everything I tried did nothing to the velocity distribution though.

My current settings:
Code:
 nOuterCorrectors 1;
    nCorrectors     7;
    nNonOrthogonalCorrectors 0;
    pRefPoint       (0 0 0);
    pRefValue       0;
Does anybody have any pointers on what to do about it?

Cheers
Attached Files
File Type: pdf VelocityDistribution.pdf (125.6 KB, 15 views)
File Type: pdf VelocityDistributionwalltowall.pdf (107.5 KB, 10 views)
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