snGrad(rho) blows up my calculation - problems with the BC
I have the problem, that in some configurations (e.g. same case on 1 or 4 CPUs) my calculations blow up. I identified the calculation of rho as a possible source of my problems.
The solver I use is interFoam in OF version 2.2.x. I use a modified boundary condition for alpha, which is derived from the mixed BC. So besides e.g. the type and the value for a zeroGradient BC I have to provide some additional fields (refGradient, refValue, valueFraction). If i write out the rho field for the first timestep, everything seems to be fine until these additional fields are listed. They have values of xxxe+235 or in the next step nan for the mentioned refGradient or refValue or valueFraction.
I would just be glad if these fields are not touched for rho. The actual "value" of the BC is correct again.
Any ideas or which additional information can I provide?
Thanks in advance!
I provided a Boundary Condition for rho - so now it does not blow up the fields..
But this BC is inconsistent with the one I provide for alpha1 - so the results get strange. Somehow the calculation of rho with a non zeroGradient BC blows up my calculation..
And the BCs for pressure and velocity where "wrong" in the provided testCase. I'll update them as soon as possible.
By the way. I had none of these problems in the OF1.6-ext Version. There, it works perfectly..
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