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Running the Cylinder3D Case for Higher Reynolds Numbers

OpenLB – Open Source Lattice Boltzmann Code Forums on OpenLB General Topics Running the Cylinder3D Case for Higher Reynolds Numbers

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  • #6204
    anandanandan86
    Participant

    Hello, I am new to OpenLB and also to simulations using Lattice-Boltzmann method. I am trying to simulate the cylinder3d sample case for higher velocities/Reynolds numbers compared to the default value (V = 0.2 m/s, Re = 20). However, when I try to increase the Re to 200 (V = 2.0m/s) the calculation diverges. For a cylinder I believe Re = 200 may be indicative of the start of transitional flow, so would the laminar setup of this case be expected to lead to divergence, or are there other solver settings that I could change to converge this case for Re = 200?

    #6208
    Adrian
    Keymaster

    You should also increase the resolution in this case.

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