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DNS of a complex geometry at moderate Re

OpenLB – Open Source Lattice Boltzmann Code Forums on OpenLB General Topics DNS of a complex geometry at moderate Re

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  • #8970
    airwarriorg91
    Participant

    Hello,
    I wish to know whether OpenLB is capable of doing direct numerical simulations i.e. no turbulence model assumption flows around complex geometries at moderate Re (20K -30K). Till now, I have been using Xcompact3D and Nek5000. Xcompact3d is good for flows till Re 5K max otherwise it is comutationally very expensive on the otherhand Nek5000 is fast but meshing around the complex geometry is difficult. So, I am looking for some alternative which is computationally fast as well as doesn’t require meshing. OpenLB seems like a good option.

    Thus, I have a few questions regd. that,

    1. How much computationally expensive OpenLB is for a DNS (Some example would be highly helpful in understanding)?
    2. How acccurate is the method ?

    I am studying flow around UAVs through DNS.

    Thanks,
    Gaurav

    #8976
    mathias
    Keymaster

    There are many papers on that topic.. for DNS you can use the most simple model BGK model, it is the least diffusive one but needs fine resolutions to be stable!

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