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Temperature (T) reactingFoam is diverging

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Old   June 11, 2015, 05:07
Default Temperature (T) reactingFoam is diverging
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Jesse Thomas
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Hi All,

I am relatively new to OpenFOAM, and am trying to use reactingFoam with reactions turned off to simulate gas spread.

My setup is modelled off a real wind tunnel experiment where a constand wind is injected in the positive x direction at 10m/s, and gas enters the domain through a smoke-stack attached to a building at 100m/s.

When I set the simulation running with an adaptive deltaT, the time-step is adjusted to be increasingly small to the point the simulation will never seem to finish. When I set deltaT to be fixed, temperature seems to diverge and repeatedly get the following warning:

--> FOAM Warning :
From function janafThermo<EquationOfState>::limit(const scalar T) const
in file /home/openfoam/OpenFOAM/OpenFOAM-2.3.1/src/thermophysicalModels/specie/lnInclude/janafThermoI.H at line 108
attempt to use janafThermo<EquationOfState> out of temperature range 200 -> 5000; T = 65.5492

Any help or suggestion anyone can provide would be immensely helpful!

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adaptive-time stepping, divergence temp, gas dispersion, reactingfoam

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