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mathias

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Viewing 15 posts - 16 through 30 (of 601 total)
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  • in reply to: Power law fluid porous media simulation #7907
    mathias
    Keymaster

    A good start is the user guide and our spring school. The next starts in March 4 2024 in Heidelberg. Best Mathias

    in reply to: 3D pipe with a 90° elbow simulation considering thickness #7887
    mathias
    Keymaster

    Dear Ali,

    we connot give support for you here by means of the forum. Consider participatong in our next spring school, a common project and an OpenLB consortium membership.

    Best
    Mathias

    in reply to: airfoil in OpenLB #7877
    mathias
    Keymaster

    info(a)openlb.net

    in reply to: boundarySimpleReflection3D #7866
    mathias
    Keymaster

    This code is no longer supported, you may find a similar approach in the new implentation. To get mire support, consider to participate in our next spring school.

    in reply to: airfoil in OpenLB #7864
    mathias
    Keymaster

    I am happy to incude a setup as example in the next release if someone sends me one..

    in reply to: Does OpenLB support local grid refinement? #7816
    mathias
    Keymaster

    Dear Jiahuilli,

    we dont have and also in the literature there are crucial gaps which need to be closed first. We have established an OpenLB Consortium https://www.openlb.net/consortium/ to speed up such developments. If you are interested in it, please let us know.

    Best
    Mathias

    in reply to: GPU Usage for Resolved Particle Dyanmics #7744
    mathias
    Keymaster

    The particle code currectly does not supported GPUs. Join the team and contribute to acceparate the refacturing or support us bymeans of a membership of the OpenLB consortium.

    in reply to: Moving obstacle #7707
    mathias
    Keymaster

    Dear Greenbee,

    using HLBM a refill approach is not needed.

    Best
    Mathias

    in reply to: Radiation in Forced Concvection #7706
    mathias
    Keymaster

    Dear Jijo,

    there are a couple of common publication of Albert Mink and myself, see https://scholar.google.com/citations?user=uDIeQOQAAAAJ&hl=en . There models are all implemented in OpenLB.

    Best
    Mathias

    in reply to: Simulation Checkpointing #7694
    mathias
    Keymaster

    Have a look at the backstep example. It is showcased there

    in reply to: how to add Smagorinsky model to LBM code #7692
    mathias
    Keymaster

    Dear garcfd,

    there might be a bug with the right scaling. You need to scale it to lattice units, which is sometime the problem. Our OpenLB implementation is working fine and is validated.

    Best
    Mathias

    mathias
    Keymaster

    The topic sound interesting and your first step promising. For the coupling you could look in the OpenLB example section “thermal”. There, a coupled model is used, ADE + NSE with a coupling approach based on Boussinesq-approximation. It should go similar to it.. You can keep me up to date on it by email, it would be good to share your results with then OpenLB community..

    Best
    Mathias

    in reply to: Parallelization and output #7684
    mathias
    Keymaster

    Dear Alex,

    your simulation has diverged. I see that form the line
    [LatticeStatistics] step=306000; t=10.2; uMax=0.01; avEnergy=-nan; avRho=-nan
    with the “nan”.

    You should checkout the last data output and look for a possible cause of the instablity. It may originate from a boundary or the bulk. If the source is the bulk, refine your mesh or increase the smago constant and if the source is the boundary extending the inflow or outflow region or intruducing a fringes might be an option.

    Best
    Mathias

    in reply to: Pressure in openLB #7677
    mathias
    Keymaster

    Dear Yuji,

    that still needs to be done and it is on our roadmap. How long it takes depends on future projects which we are hoping to get..

    Best
    Mathias

    in reply to: In examples at cylinder3d #7674
    mathias
    Keymaster

    Hi Yuji,

    as in the spring school example cavity2d with the higher Reynolds number, you need to choose a finer resolution for stability. The stability condition is as indicated in the book of Krüger et al.

    Best
    Mathias

Viewing 15 posts - 16 through 30 (of 601 total)