Reply To: Cylinder2D study

[AntoineJ]

Yes it works,

Last question about the relaxation time, I don’t understand how you defined it for each example.
For the example of laminar flow around a cylinder, it is 0.56 for the 2D simulation and 0.53 for the 3D case.

This relaxation time is related to viscosity and the time step, as the viscosity is defined by the velocity and the Reynolds number, the relaxation time basically define the time step.
So the strategy is to find a time step where there is a good stability/accuracy or the relaxation time that makes sense for a specific case?

Greetings,
Antoine