Solid-Gas Multiphase System ERROR: Turbulent viscosity limited to viscosity ratio of 1.000000e+05
I am simulating a multiphase system (gas-solid using Eulerian Granular, Model: Realizable k-e, Standard Wall Function) with a air inlet velocity of 13 m/s. I want to simulate it as a fluidized packed bed reactor (without inlet and outlet flow of plastic pellets) and with "Adapt" - "Patch" I fill the reactor with plastic pellets (see image).
I have a problem during the calculation. I get a floating point exception error (turbulent viscosity limited to viscosity ratio of 1.000000e+05). I refined my mesh looking at skewness and orthogonal quality and it was really fine. I looked at some other forums and it seems that the k-epsilon model is probably calculating erroneously or my solver/controls setup is not right for my simulation.
Is there anyone who could help me with this problem? If you need more information I will immediately share it with you.