[miguelCai]

Hello everyone,
I'm working on a heat transfer simulation using OpenFOAM v12 with the fluid solver and turbulence model kOmegaSST. I'm trying to define the dynamic viscosity mu and thermal conductivity kappa as temperature-dependent using polynomial coefficients in constant/physicalProperties.
My thermoType is set as:
type heRhoThermo;
mixture pureMixture;
transport polynomial;
thermo hPolynomial;
equationOfState perfectGas;
specie specie;
energy sensibleEnthalpy;


Inside mixture/transport, I define:


viscosityModel polynomial;
muCoeffs<8> (1.26e-6 4.227e-8 -6.3532e-12 0 0 0 0 0 ); //Pa.s

thermalConductivityModel polynomial;
kappaCoeffs<8> (-0.0041379389 7.26286393e-05 -5.084428e-09 0 0 0 0 0); // [W/m/K]


The solver compiles the dynamic library but crashes at runtime with:


Foam::fluidThermo::nu() const
Floating point exception (core dumped)


I’ve confirmed the mesh is fine, the case runs correctly with constant mu and kappa, and all other fields (U, p, T, k, omega, nut, etc.) are correctly initialized.
Has anyone encountered this issue or managed to run fluid with temperature-dependent mu and kappa using the polynomial option in OpenFOAM v12?
Any insight would be greatly appreciated.
Thanks in advance!

[miguelCai]

Sorry. It was a mistake. viscosity model was not defined earlier. Now it works properly.