Reverse flow and Turbulent Viscosity Issue in Ansys Fluent

Hello everyone,

I am currently facing an issue in Ansys Fluent while working on a reactor simulation. After running my simulation, I encountered the following messages in my residual transcript:

DPM Iteration ....

temperature limited to 1.000000e+00 in 8 cells on zone 10 in domain 1

number tracked = 40, escaped = 17, trapped = 23

turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 457 cells

20 6.2527e+01 2.7448e-03 2.9115e-03 3.7521e-03 5.6725e-03 3.2007e-02 1.4097e-01 4.4115e-04 0.0000e+00 0.0000e+00 9.1858e-04 9.1858e-04 3:13:26 9990

reversed flow in 14 faces on outflow 14.

temperature limited to 1.000000e+00 in 18 cells on zone 10 in domain 1

I initially performed a simulation with a gas velocity of 6 m/s, and the results were fine. However, after changing the velocity to 1 m/s, I encountered the above issues.

Does anyone know how to address these problems?

You can find the transcript attached to this query

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