code_saturne User's Forum

Hello,

In resolp, we compute a pressure variation to update the velocity.
To my knowledge, the Poisson equation is solved by a jacobi.

The REX about it is to use a precision around 10^(-5). Is the stop criterion applied on for the Jacobi method?

Best regards,
Laurent.

Hello,

The solver for pressure correction is a PCG or multigrid solver, not Jacobi.

The default tolerance is 10^(-5) for LES, 10^(-8) otherwise (but 10^(-5) should be OK in most cases).

I'm not sure about the details of the stop criterion.

Regards,

Yvan

Hello Yvan,

It's a PCG because it's a positive-definite matrix...
Thank you for answer.