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SimpleFoam: Residual convergence problem

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Old   April 24, 2018, 19:50
Default SimpleFoam: Residual convergence problem
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Dear Foamers,

I am trying to simulate a wind around a building (e.g. cube) using simplefoam solver, realizablekE model and cyclic BCs. The flow is powered by a constant source hardcoded in the solver. But my residuals show some convergence problems.
First it is having constant oscillation.
And second it is having a bump after a point.
I linked a plots below.

Does anyone have any ideas what could cause these?

Thank in advance.
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