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Relaxation of the computation

It is possible to relax the computation to make it more stable
It is so called under-relaxation, basically it defines a proportion of a new computed solution to be used to update the old one.
- value means no relaxation
- value means that solution does not change (never used – it makes no sense)
Relaxation increases stability in case of bad mesh quality or critical flow conditions
Relaxation is suitable for SIMPLEC algorithm only
Relaxation factors relaxationFactors are set in system/fvSolution

If nothing specified, no relaxation is used, i.e. all relaxationFactors are 1.0

relaxationFactors
{
    equations
    {
        U               0.9;
        k               0.7;
        omega           0.7;
    }
}