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Fluids

Fluids

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  3. ERROR #004100018, Fatal overflow in linear solver.

ERROR #004100018, Fatal overflow in linear solver.

    • August 7, 2024 at 10:07 am
      asustark700
      Subscriber

      Hi there,

      I'am doing a simulation of assembly of centrifugal compressor (Impeller + diffuser)

      Project schematic

      when i run the simulation. it's been several times. Exectly on 50th iteration i get this error.  
      the residual graph:

      I'm using Ansys 2024 student version

    • August 8, 2024 at 11:02 am
      V.P
      Ansys Employee

      Hi,

      This can be due to high velocity flow inside the domain, can you recheck the inlet conditions?

      Also, try running the case using Double Precision.

    • August 13, 2024 at 10:10 am
      Petros
      Ansys Employee

      Hi,

      Is the operating point close to one of the speed curve limits? If so, can you try using exit corrected mass flow for the outlet?

      Also what are your current boundary conditions?

      Thanks

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