PINN Baseline PDE

[2ailesB]

Hi,
I downloaded the dataset for the 1D Navier-Stokes Compressible Equation., and I have several questions about the PINN PDE that is implemented in pinn .

• Why is the loss not corresponding to the equation provided in Appendix D5 ? Several terms are missing in the code, is there an explanation for that ? (In particular for the case where eta and zeta are 1e-1, these terms may have some influence ?).
• What is the value of the viscous stress tensor ? How to fins the missing config to implement the complete PINN ?
• I have noticed that there was a - before the pressure term in the second equation in the code, shouldn't it be a + ?

Thanks a lot for your help!

[LouisSerrano]

I have the same issue. It seems the implementation does not follow the equations from the paper, especially (16b). Maybe there is something that I am missing too. Could you provide an explanation for what has been implemented in pdebench/models/pinn/pde_definitions.py in the function pde_CFD1d ?

[lin01109]

have the same issue here