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Compressible LBM

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  • August 21, 2020 at 2:23 pm #5106
    Bhuttu
    Participant

    Hello,
    I am using Lattice Boltzmann to simulate Plane-Poiseuille flow. I wanted to know if I am working in velocity range from zero to 0.15 How much change in density values is acceptable
    . Density was initialized with 1.0 and after the convergence density value is 0.995
    Am I wrong somewhere in the code or this value is because of compressibility effects??

    Thanking you.
    Bhuttu

    August 22, 2020 at 3:03 pm #5107
    mathias
    Keymaster

    Dear Bhutta,

    in LBM \rho is lineraly related to pressure. The mentioned case converges to the analytical NSE solution, so the reported values must be as they are. You may checkout and study the provided error normss

    Best
    Mathias

    August 23, 2020 at 11:38 am #5108
    Bhuttu
    Participant

    Hello Mathias
    Please suggest me a good source to study about the error norms. It will be really helpful for me.

    Thanks and regards
    Bhuttu

    August 23, 2020 at 12:00 pm #5109
    mathias
    Keymaster

    see our examples on Poiseuille flow as well as our papers.

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