[amuzeshi]

Hello there,
I'm currently on an FSI simulation. Can anyone explain what is relRes in the image?
Where do we specify this?
solids4Foam tutorial tells it has to be specified in solidProperties. A typical solidProperies is shown here, but there is no entry for relRes.

unsNonLinearGeometryUpdatedLagrangianCoeffs
{
    nCorrectors             100000;
    // Solution tolerance for displacement
    solutionTolerance       2e-06;

    // Alternative solution tolerance for displacement
    alternativeTolerance    9e-06;

    // Material law solution tolerance
    materialTolerance       1e-05;

    // Write frequency for the residuals
    infoFrequency           100;

   // Stabilise hydrostatic pressure field
    stabilisePressure       yes;
}

[Hgholami]

It seen this report comes from solidModelTemplates.C

// Print residual information
if (iCorr == 0)
{
Info<< " Corr, res, relRes, matRes, iters" << endl;
}
else if (iCorr % infoFrequency_ == 0 || converged)
{
Info<< " " << iCorr
<< ", " << solverPerfInitRes
<< ", " << residualvf
<< ", " << materialResidual
<< ", " << solverPerfNIters << endl;

if (residualFilePtr_.valid())
{
residualFilePtr_()
<< solverPerfInitRes << " "
<< residualvf << " "
<< materialResidual
<< endl;
}

if (converged)
{
Info<< endl;
}
}

And residualvf in the mentioned file calulated as:

const scalar residualvf =
gMax(mag(vf.internalField() - vf.prevIter().internalField()))/denom;

• res (linear solver residual)
• relRes (relative residual: change of the primitive variable)
• matRes (material residual: for nonlinear material laws)
Ref:Solid mechanics and fluid-solid interaction using the solids4foam toolbox