Fluids

Fluids

Error: floating point exception

    • TokarZak
      Subscriber

      Hi, Pls help me to solve this error, wich i have after initialization.


       


      Initialize using the hybrid initialization method.


       


      Checking case topology... 


      -This case has both inlets & outlets 


      -Pressure information is available at the boundaries


       


      iterscalar-0scalar-1


       


              Stabilizing ads-0 to enhance linear solver robustness.


       


      Divergence detected in AMG solver: ads-0


      Divergence detected in AMG solver: ads-0


      Divergence detected in AMG solver: ads-0


      Divergence detected in AMG solver: ads-0


      Divergence detected in AMG solver: ads-0


      Divergence detected in AMG solver: ads-0


      Divergence detected in AMG solver: ads-0


      Divergence detected in AMG solver: ads-0


      Divergence detected in AMG solver: ads-0


      Divergence detected in AMG solver: ads-0


      Divergence detected in AMG solver: ads-0


      Divergence detected in AMG solver: ads-0 1 1.000000e+00 1.000000e+00


      27.069178e-151.032749e-07


      31.247592e-155.052188e-08


      42.017610e-156.174646e-09


      58.277866e-161.961420e-09


      66.685306e-166.028668e-10


      73.816698e-163.438961e-10


      82.523928e-161.602407e-10


      93.202773e-161.096430e-10


              Stabilizing ads-0 to enhance linear solver robustness.


      104.077587e-165.657155e-11


       


      Hybrid initialization is done.


       Error at Node 6: floating point exception


      Error at Node 11: floating point exception


      Error at Node 2: floating point exception


      Error at Node 0: floating point exception


      Error at Node 7: floating point exception


      Error at Node 5: floating point exception


      Error at Node 8: floating point exception


      Error at Node 9: floating point exception


      Error at Node 1: floating point exception


      Error at Node 3: floating point exception


      Error at Node 10: floating point exception


      Error at Node 4: floating point exception


      Error at host: floating point exception


       


      ===============Message from the Cortex Process================================


       


      Compute processes interrupted. Processing can be resumed.


       


      ==============================================================================


       


      Error: floating point exception


      Error Object: #f


       ######################################################################################


      Mesh Check


       


      Domain Extents:


         x-coordinate: min (m) = -3.284205e-01, max (m) = 9.376061e-01


         y-coordinate: min (m) = -1.214897e+00, max (m) = 1.214805e+00


         z-coordinate: min (m) = -1.300000e+00, max (m) = 1.214776e+00


       Volume statistics:


         minimum volume (m3): 3.039545e-15


         maximum volume (m3): 2.135412e-04


           total volume (m3): 2.186046e+00


       Face area statistics:


         minimum face area (m2): 5.922891e-12


         maximum face area (m2): 3.296252e-03


       Checking mesh.....................................


      Done.


      ################################################################


       

    • TokarZak
      Subscriber

      Also i am add the pictures, where i apply BC to model.


    • Mostafa22
      Subscriber

      dear TokarZak,


      I think for your model, you have some fine contact regions. So in the mesh interfaces, you can modify these contact regions into a coupled wall and mapped as well as check the material properties.


      I wish these suggestions help you


      regards,


      mostafa

    • Keyur Kanade
      Ansys Employee

      The image is not so clear.


      If you have those contact regions - 


      Go back to design modeler. Select all bodies  in the model tree and create a single part. This will give conformal mesh between different bodies. 


      Then mesh it and then come to fluent. 


    • Keyur Kanade
      Ansys Employee

      Also please check quality of the mesh. The min ortho quality should be more than 0.1.


      The min volume is very less. So pleas use double precision. 

    • seeta gunti
      Ansys Employee

      Hello,


      I guess solver is diverging in UDS. Please run the continuity and momentum equations first. After flow gets stabilized, turn on UDS.  Reduce the URFs and initially run with first order then change to second order.


      Regards,


      Seeta


       

    • TokarZak
      Subscriber

      Hi, thaks a lot for response. But i dont use UDS.

    • DrAmine
      Ansys Employee

      Could you please elaborate on your problem physics and problem setup?

    • TokarZak
      Subscriber

      Hi, i have really big model, but with simple setup: Without Energy eq. viscous model is laminar. I was set pressure on inlet and out let, choose material like water-vapor.


      i will add link for CASE:


      https://drive.google.com/open?id=1JXFRIWzWPdkpLnpkHPGe8g0M2hDXItQq


      Best regards


      Zak

    • TokarZak
      Subscriber

      Ok, It was solved. Thanks a lot.

    • Keyur Kanade
      Ansys Employee

      can you please mark this as 'Is Solution' to help others on forum. 

    • aliazzam
      Subscriber
      what was the solution please ????????

       


       


    • aliazzam
      Subscriber

      how did u do it please ???

    • Rob
      Ansys Employee

      Please post in a new thread with details of your problem. 

Viewing 13 reply threads
  • You must be logged in to reply to this topic.