Hi everyone,

I try to do a simulation about heat transfer of supercritical hydrogen in a cooling channel. Properties of H2 is obtained from NIST and displayed by an UDF function. I used the k-w model. If i set inlet temperature at 300K, everything is fine and correct. But when i set it to 34.6K, i ran into the problem " turbulent viscosity limited to viscosity ratio of 1.000000e+05 in xxx cells". My mesh is very fine as displayed below. CAn anyone help me to solve the problem

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