[suryakaundinya]

Hello,

I am running a quasi-DNS simulation of primary atomization of high pressure liquid jet using isoadvection VOF method i.e. interIsoFoam solver. I have a very fine grid in region where I expect the spray to be present and a coarse grid in region surrounding it.

At some point in my calculation, I get the following Warnings :

From function void Foam::isoCutFace::cutPoints(const pointField&, const scalarField&, Foam::scalar, Foam:ynamicList<Foam::Vector<double> >&)
in file fvMatrices/solvers/isoAdvection/isoCutFace/isoCutFace.C at line 667
cutPoints = 3((0.00016 -0.0069 0.00026) (0.00017 -0.0069 0.00026) (0.00018 -0.0069 0.00026)) for pts = 5((0.00016 -0.0069 0.00026) (0.00017 -0.0069 0.00026) (0.00018 -0.0069 0.00026) (0.00018 -0.0069 0.00028) (0.00016 -0.0069 0.00028)), f - f0 = 5(0 9.8122982e-16 1.9624596e-15 -6.711945e-07 -6.711945e-07) and f0 = 8.0308739e-12
--> FOAM Warning :
From function void Foam::isoCutFace::quadAreaCoeffs(const Foam:ynamicList<Foam::Vector<double> >&, const Foam:ynamicList<Foam::Vector<double> >&, Foam::scalar&, Foam::scalar&) const
in file fvMatrices/solvers/isoAdvection/isoCutFace/isoCutFace.C at line 714
Vertex face was cut at pf1 = 3((0.00016 -0.0069 0.00026) (0.00017 -0.0069 0.00026) (0.00018 -0.0069 0.00026))

Is it because of high gradients in the regions where the cell size abruptly changes? The simulation is quite stable and is running without any error. But I would like to know why do I have these warnings and how to address them.

Thanks in advance for the suggestions and help.

With regards,
Surya.

[S_teph_2000]

Hello Surya,

Did you find a way to remove the warnings?

Kazunobu

[mwmalkawi]

Did you manage to resolve this error as it been three month and i couldn't figure it out


Many thanks in advance

[kk415]

One way to resolve the above issue is to reduce the upper and lower limit for alpha. However, this can compromise the accuracy of the result.