Currently creating simulation of differing bullet shapes to measure change in coefficients. I keep getting this error even after trying to change different variables and going through other support threads.
When checking the solver log I see this error. How do I fix this?
FOAM FATAL ERROR: (openfoam-2406)
[3] Negative initial temperature T0: -12.8847121546
[3]
[3] From Foam::scalar Foam::species::thermo<Thermo, Type>::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo<Thermo, Type>::)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo<Thermo, Type>::)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo<Thermo, Type>::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo<Foam::perfectGasFoam::specie >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo<Thermo, Type> = Foam::species::thermo<Foam::hConstThermo<Foam::perfectGasFoam::specie >, Foam::sensibleEnthalpy>]
[3] in file at line 57.
[3]
Problem solved, was simply using too high of a flow rate for compressible simulation
Well, this isn’t exactly a solution (although it solves the error code but not the overall problem), as compressible-flow simulations shouldn’t crash just because of a high flow rate (air velocity). It might be worth discussing other settings of your simulation. Based on your solver error, the issue seems to relate to large temperature variations in one part of the domain, which could indicate several problems—ranging from mesh quality, boundary conditions, initialization, and discretization schemes to Courant number, among others.
Some external post entries relevant to this problem are: