Problem in Simulation with higher Reynolds number in Cylinder3d
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Dear OpenLB team,
I am facing a problem on the example Cylinder3D, which is a laminar flow model with Re no. 20. But for my work I need to test the model with Reynolds number more than 1000. But as I increase the Reynolds number more than 100 the simulation model breaks down in Paraview and so please tell me that what do I need to change in the code so that I can run the code with Reynolds number 1000, 3000 or 5000 or more.Do I need to change the whole code or I need to change any parameters? Please help.
Thank you
You need to adjust the resolution depending on the Reynolds number to keep the simulation stable. In this particular example you want to ensure that the lattice velocity doesn’t exceed ~0.1. You can adjust the resolution right above the line where you changed the Reynolds number. For more details on stability and other LBM basics you can check out e.g. the book by Krüger et al.
Using a LES model may also be of interest in your case (if you want to target even higher Reynolds numbers).
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