Ansys Learning Forum › Forums › Discuss Simulation › Fluids › What is the reason for instability of source terms using DEFINE_DPM_SOURCE and DEFINE_DPM_LAW? › Reply To: What is the reason for instability of source terms using DEFINE_DPM_SOURCE and DEFINE_DPM_LAW?
February 9, 2021 at 1:07 pm
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Only stochastic tracking doesn't help, it eventually leads to instabilities.n
Combining both, meaning to set the underrelaxation factor from .1 to .01 helped more. Instabilities did not occur as long as I tested.nBut still, I think there has to be a trick to not only keep it stable, but to let the solution converge faster.n
