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Ansys Learning Forum Forums Discuss Simulation Fluids Weird Behaviour of Residuals in transient simulation Reply To: Weird Behaviour of Residuals in transient simulation

Essence
Ansys Employee

How do the report definitions look? Are they stable? Did you try using expressions instead of UDF to vary the outlet pressure? Try to increase the number of iterations per time step. Can you share the screenshot of the mesh? And what is the quality (orthogonal quality, aspect ratio, skewness) of the mesh?