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Correct typo, see #1270 #1282

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Oct 23, 2016
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Correct typo, see #1270 #1282

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6 changes: 3 additions & 3 deletions src/Backends/Helmholtz/VLERoutines.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1173,13 +1173,13 @@ void SaturationSolvers::successive_substitution(HelmholtzEOSMixtureBackend &HEOS
df += dfdK*(deriv_liq-deriv_vap);
}

if (std::abs(df) <= 1e-12) { // To avoid dividing by 0
if (std::abs(f) <= 1e-12)
if (std::abs(df) <= 1e-14) { // To avoid dividing by 0
if (std::abs(f) <= 1e-12) // 1e-12 is the loop convergence criterion
{
change = -f; // Should be converged. f <= e-12, so change will have nearly no impact.
}
else {
throw ValueError(format("df very small (df = %g) in successive_substitution but f is not converged (f = %g < 1e-12).",df,f));
throw ValueError(format("df very small (df = %g) in successive_substitution but f is not converged (f = %g > 1e-12).",df,f));
}
}
else {
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