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[Thermo] Improve error message generated by Substance::set_xy

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This commit is contained in:
Ray Speth
2015-05-29 11:15:00 -04:00
parent e292caa187
commit 78f60e2d5f
1 changed files with 14 additions and 1 deletions
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15
src/tpx/Sub.cpp
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@@ -10,6 +10,11 @@
using std::string;
using namespace Cantera;
namespace {
// these correspond to ordering withing propertyFlag::type
std::string propertySymbols[] = {"H", "S", "U", "V", "P", "T"};
}
namespace tpx
{
Substance::Substance() :
@@ -514,7 +519,15 @@ void Substance::set_xy(propertyFlag::type ifx, propertyFlag::type ify,
Set(PropertyPair::TV, t_here, v_here);
LoopCount++;
if (LoopCount > 200) {
throw TPX_Error("Substance::set_xy","no convergence");
std::string msg = "No convergence. " +
propertySymbols[ifx] + " = " + fp2str(X) + ", " +
propertySymbols[ify] + " = " + fp2str(Y);
if (t_here == Tmin()) {
msg += "\nAt temperature limit (Tmin = " + fp2str(Tmin()) + ")";
} else if (t_here == Tmax()) {
msg += "\nAt temperature limit (Tmax = " + fp2str(Tmax()) + ")";
}
throw TPX_Error("Substance::set_xy", msg);
}
}
}