We’re updating our badges platform. Badge issuance is temporarily paused, but all completions are being recorded and will be fulfilled once the platform is live. Thank you for your patience.
LS Dyna

LS Dyna

Topics related to LS-DYNA, Autodyn, Explicit STR and more.

LS Dyna MPP double precision solver

    • Atish Gawale
      Subscriber

      Hi,

      I am running simulation with mpp d r14.0 LS-Dyna solver using open MPI platform on HPC. I specified NCPU 128, but when I check my output file it shows 

      MPI execution with 1 procs. Can you please help to resolve this query?

      Regards,
      Atish

       

    • igandiko
      Ansys Employee

      NCPU is used for SMP and Hybrid solvers. The correct command to run MPP LS-DYNA is,

      /path/mpirun -np 128 /path/ls-dyna.exe i= input.k

      If 128 MPI ranks are on different hosts, you may need a file with a list of hosts. Please see here for more information (https://ftp.lstc.com/anonymous/outgoing/support/FAQ/mpp.getting_started). 

       

    • Atish Gawale
      Subscriber

      Hi,

      I am running fluid analysis using CESE solver.

      I am able to use higher processor now. I ran with 16 processors and I get following error.

      With MPP_D and 1 processor there is no error. with higher processors I get following error.

      mes0000

      No elements with calculated timesteps
             1 t 0.0000E+00 dt 2.22E-09 flush i/o buffers            08/21/24 13:46:17
             1 t 0.0000E+00 dt 2.22E-09 write d3plot file            08/21/24 13:46:17
       
       *** Error 100116 (CESE+116) (processor # 0)
             20959704 errors detected in CESE solver during step = 1
       
       *** Error 100117 (CESE+117) (processor # 0)
                    1 of these CESE solver errors detected on processor # 0
       
       *** Error 100118 (CESE+118) (processor # 0)
           Errors detected in CESE solver integration step.
           Please check each processor's message file for details.
       
       When error termination was triggered, this processor was
       past the output routines
       
      mes0001 - to mes 0015 i got following error.
       
      No elements with calculated timesteps
       
       *** Error 150209 (CHEM+209)
           Chemistry EOS nonlinear temperature solver failed to converge.
           Error code = 50 Last iterate temperature = NaN
       
      Do I need to include any control cards for MPP (*CONTROL_MPP_XXXXX)? 
       
      Regards,
      Atish
      • Jacques
        Subscriber

        Hi Atish Gawale,

        Have you found the reason for that, I get the same problem with you. 

        *** Error 100116 (CESE+116) (processor # 0)
                     29 errors detected in CESE solver during step = 36
         
         *** Error 100118 (CESE+118) (processor # 0)
             Errors detected in CESE solver integration step.

        Regards,

        Jacques

    • Atish Gawale
      Subscriber

      This error is very common in *CESE fluid solver with *CHEMISTRY and related to non-physical model setup or non-convergence as well. 

      Please check if you have included all necessary keywords in your model.

      Regards,
      Atish

Viewing 3 reply threads
  • You must be logged in to reply to this topic.