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Flamelet with GRI 3.0

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Old   February 14, 2013, 06:36
Default Flamelet with GRI 3.0
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Patrick Wollny
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Hello there,

Im trying to simulate a 2D Oxy-Fuel combustion with medium high velocity using the steady flamelet model. Ive already simulate this case with EDC and Equilibrium, which was no problem. Now, after generating the flamelets and the PDF-Table for the GRI 3.0 Mech, the simulation creates very strange solutions. The Fluent output tells me, that there is a minimum PDF Table temperature in about 12k cells and even the temperature contour shows a cold bubble around the flame. Ive tried a bunch of flamelet generation settings with always 40 flamelets and the flamelets are all converged, but all showing the same behaviour. What can be the problem?

Many thanks,
Patrick
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Old   February 15, 2013, 12:11
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Patrick Wollny
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No idea? Hmmm, it seems like there is something like an pole point in the near of a scalar dissipation of 1.The temperature decreases and the co mole fraction increases at this point.
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