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Ansys Learning Forum › Forums › Discuss Simulation › LS Dyna › LS Dyna CESE solver › Reply To: LS Dyna CESE solver

September 18, 2024 at 4:22 pm
Atish Gawale
Subscriber

Hello,

1) If you have defined composition of fluid using *CHEMISTRY keywords, then you need to use CESE_INITIAL_CHEMISTRY otherwise use CESE_INITIAL. Then you must also specify the CESE_MAT_GAS and CESE_EOS. 

2) Yes, you need to create the SET_SOLID for each composition and they should not overlap.

3) Grid size should be very small. Min size can be less than 1cm in the combustion domain. I will recommend structured hex mesh. 

4) Error is typical with CESE solver. If solver finds anything non-physical then it gives only one typical error for any problem. Be is related to mesh size, time step size, non-physical pressure, temperatures, boundary conditions or any other problems. 

Regards,
Atish