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
Best regards,
Laurent.
Pressure Solver
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laurent_makke
- Posts: 4
- Joined: Thu Jul 30, 2015 4:56 pm
Pressure Solver
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.
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
Best regards,
Laurent.
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Yvan Fournier
- Posts: 4208
- Joined: Mon Feb 20, 2012 3:25 pm
Re: Pressure Solver
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
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
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laurent_makke
- Posts: 4
- Joined: Thu Jul 30, 2015 4:56 pm
Re: Pressure Solver
Hello Yvan,
It's a PCG because it's a positive-definite matrix...
Thank you for answer.
It's a PCG because it's a positive-definite matrix... Thank you for answer.