Learning Forum

[786959915]

In the process of secondary development of user-defined equations of state, what aspects should be paid attention to in the update of temperature and time? Also, do you have any advice for beginners in secondary development?

[Pedram Samadian]

Hi,

The consistency between the temperature update and energy balance in the system, the update of the temperature-dependent parameters such as specific heat capacity or heat transfer coefficent, and the compatibility between the update approach and applied time-integration scheme (explicit or implicit) are essential when working on the secondary development of user-defined equations of state in LS-DYNA. 

Please check the LS-DYNA Theory Manual (LS-DYNA Theory Manual) and Keyword User’s Manual Vol. 1 – Appendix B (LS-DYNA Keyword Manual) for further information.

Some advice for you:

• Test your code with simple problems before moving to complex simulations.
• Add checks in your code to catch unphysical values (e.g. negative densities, infinite temperatures).
• Compare your EOS implementation with experimental data or benchmark problems to ensure accuracy.

I hope this helps.

Thanks,

Pedram

[786959915]

Thank you very much for your reply, I will make an effort according to your suggestions。