Fluids

Fluids

Divergence detected

    • Ansan
      Subscriber

      Well, I was running eulerian-ddpm model (k-w). The simulation was running fine and smooth but after about 7400 iterations I got a problem # You may try the enhanced divergence recovery with (rpsetvar 'amg/protective-enhanced? #t), Divergence detected in AMG solver: phase-1-species-2, floating-point exception. I have worked with mesh and geometry before and had no problem. How can I solve this issue?

    • Rob
      Ansys Employee

      Have a look at the flow field, and see what's going on. It's likely that the previously stable solution has reached a point where the flow field is no longer stable. 

    • Ansan
      Subscriber

      What kind of parameter should I look at flow field, any recommendations?

    • DrAmine
      Ansys Employee

      Debug the issue by looking in the files stored before the point of no return. Start then looking into velocity and phase distribution and pay attention to any stagnation or overshoots. Check if things are accumulating by enabling post-processing residuals Fluent (under /solve/set/expert). What is the scope of the case? Add more details about models and settings.

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