Turbulence viscosity needs update when realizable k-e model is used for volume fraction related calculation
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After reading cas/dat files and doing the first iteration, the message would always appear: turbulence viscosity limited to viscosity ratio of 1e05 , though it didn't happen before the cas/dat file was saved. This may even result in divergence. This was a bug in V6.1 for the calculation of VOF and phase change when realizable k-e turbulence model is used. When reading cas/dat files, the code does not update turbulence viscosity properly. The bug was fixed. For now, the workaround is to use Execute_On_Demand udf to update the viscosity after reading cas/dat: #include "udf.h" DEFINE_ON_DEMAND(update_visc) { Domain *domain = Get_Domain(1); Update_Velocity_Derivatives(domain); } |
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