Dear developers,
Please I want to ask a question about the inner iterations.
In GUI, in "Time settings"-"Velocity-Pressure algorithm", I can find two options available: "SIMPLEC" and "inner iterations", shown in the figure below. I'm confused about this.
When I did LES simulations, I always chose SIMPLEC, does this mean I didn't have any inner iteration? This seems strange for an unsteady simulation. If I switch to "inner iteration" and set a number, then what will the velocity-pressure coupling method be?
Many thanks,
Ruonan
Question about inner iteration
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Re: Question about inner iteration
Hello,
The "inner iteration" here is different from the "sweeps" needed for non-orthogonal meshes, so you do not usually need them for LES. They are often used in fluid-structure interactions though, when the boundary condition is updated during the computation. I am not sure in which other cases they are needed..
So "inner iteration" is a bit different from SIMPLE.
Best regards,
Yvan
The "inner iteration" here is different from the "sweeps" needed for non-orthogonal meshes, so you do not usually need them for LES. They are often used in fluid-structure interactions though, when the boundary condition is updated during the computation. I am not sure in which other cases they are needed..
So "inner iteration" is a bit different from SIMPLE.
Best regards,
Yvan
Re: Question about inner iteration
Hello Yvan,
Thanks for your reply! My understanding was wrong, I thought the inner iteration was used to decrease residuals when moving from this time step to the next time step. It seems I don't need to think about it for LES simulation.
Best regards,
Ruonan
Thanks for your reply! My understanding was wrong, I thought the inner iteration was used to decrease residuals when moving from this time step to the next time step. It seems I don't need to think about it for LES simulation.
Best regards,
Ruonan