simtk.org

Hello,

Does anyone know the mathematical form of the residual norm we try to bound by the following lines of code in solver.inp

"Residual Control: True
Residual Criteria: 0.01"

1. In particular, what does the parameter 'residual criteria' imply ? Would this monitor error norms on velocities or pressure or both ?
2. Are we iterating to get the absolute or the relative norm of the quantities converge ? If we are working with relative norms, is it with respect to the quantities from the last iteration ?

Thanks in advance for your time!

Sincerely,
Sudharsan

Hi,

The Residual Criteria monitors the average residual norm over all finite elements. The residual includes four components, one form continuity equation, three from momentum. It's absolute residual.

Thanks,
Hongzhi

Hi Hongzhi,

Thanks a lot for explaining.

Have a nice day!
-Sudharsan