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Dirichlet BC to fixed concentration on a curved wall

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  • March 26, 2024 at 6:10 am #8429
    Danial.Khazaeipoul
    Participant

    Dear community,

    I am trying to solve for the concentration field within a 3d pipe using the advection-diffusion equation and D3Q7 lattice descriptor. Since the “setAdvectionDiffusionTemperatureBoundary” can not be used on a curved wall, is there any type of BC already available in OpenLB’s framework to fix the value of concentration on the wall?

    The /adsorption/microMixer3d example uses bounceBack, but the near wall concentration distribution does not seem physically correct to me.

    Regards,
    Danial

    March 27, 2024 at 11:55 am #8430
    shota
    Participant

    Dear Danial,

    indeed the “setAdvectionDiffusionTemperatureBoundary” can not be used on curved walls.
    You can try the “setBouzidiAdeDirichlet” BC which is a similar scheme to the Bouzidi scheme but for prescribing a fixed concentration on curved walls for ADE. However, this BC is not fully validated yet. The implemented scheme can be found here https://doi.org/10.1016/j.jcp.2012.11.027.

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