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mathias

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Viewing 15 posts - 406 through 420 (of 601 total)
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  • in reply to: Computing Wall Shear Stress #2574
    mathias
    Keymaster

    It is the drag coefficient but it is an integral over a force computed by momentum exchange algorithm multiplied by some constants.

    Best
    Mathias

    in reply to: Computing Wall Shear Stress #2572
    mathias
    Keymaster

    Dear Shaun,

    you can have a look at the cylinder2d/3d example. We compute the drag there which is a small step to wall shear stress.

    Best
    Mathias

    in reply to: Create a new Geometry #2570
    mathias
    Keymaster
    in reply to: airfoil in OpenLB #2565
    mathias
    Keymaster

    You should use Bounce Back as boundary condition.

    Best
    Mathias

    in reply to: Free slip boundary condition #2557
    mathias
    Keymaster

    Right. It will be included in the next release which will be available in about amounth or two. Best mathias

    in reply to: Free slip boundary condition #2555
    mathias
    Keymaster

    We already did implement a free-slip condition. It works like bounce-back. Please have a look at the dogygen documentation on our web site.

    Best
    Mathias

    in reply to: Simulation of Hydrophobic surfaces #2547
    mathias
    Keymaster

    I would start with changing one of the multi-component examples by changing boundary conditions as well as putting new geometry features in.

    Best
    Mathias

    in reply to: Simulation of Hydrophobic surfaces #2544
    mathias
    Keymaster

    Dear shaunellis-22,

    your simulation diverged. Did you get nan straight after a few time steps? It might be that you set some unqhysical boundary conditions or the chosen force is too high. Also too high velocities yield to unstabliities. I would start with the provided example and change one thing after another checking all the time that the simulation is stable.

    Best
    Mathias

    in reply to: Simulation of Hydrophobic surfaces #2538
    mathias
    Keymaster

    Dear shaunellis-22,

    Have a look at our 2-phase and 2-component examples in the example section.

    Best
    Mathias

    in reply to: Parallel mode and Ubuntu 16.04 #2521
    mathias
    Keymaster

    In order to help you, I need
    a/ the outpout of the compilation process
    b/ the COMPLETE output of the simulation

    Best
    Mathias

    in reply to: help me with this #2515
    mathias
    Keymaster

    Dear cloner0101,

    in the examlpe “cavity2d” you will find an xml-file which you can use to setup parts of the simulation. It is not yet as advanced as in OpenFoam.

    Best
    Mathias

    in reply to: input data #2514
    mathias
    Keymaster

    Dear cloner0101,

    in the examlpe “cavity2d” you will find an xml-file which you can use to setup parts of the simulation. It is not yet as advanced as in OpenFoam.

    Best
    Mathias

    in reply to: Parallel mode and Ubuntu 16.04 #2513
    mathias
    Keymaster

    Please recompile by “make cleanbuild” “make clean” and “make” and send me the output. Thanks Mathias

    in reply to: Parallel mode and Ubuntu 16.04 #2501
    mathias
    Keymaster

    Dear Liliana,

    can you post the output or send me by email. We did not see any problems so far. Please, also send me the versions of openmpi and g++?

    Best
    Mathias

    in reply to: Turbulence Models #2499
    mathias
    Keymaster

    Dear Sumit,

    why dont you come to our spring school in Tunesia in March! We will have plenty of time to discuss your questions. There will be an extra lecture on turbulence by Patrick.

    Best
    Mathias

Viewing 15 posts - 406 through 420 (of 601 total)