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mathias

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Viewing 15 posts - 466 through 480 (of 616 total)
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  • in reply to: Non newtonian fluid flows #2413
    mathias
    Keymaster

    Dear Ameen,rnrnSo far we have only powerLaw implemented. Since OpenLb is programmed in a very gernic style, it should be possible to extent it.rnrnI would start with a single phase implementation in a channel first. Look at the “”poiseuille2d”” examples and start changing them. rnrnWe will have a spring school in March which could help you to get started.rnrnFurther, feel free to cantact me at info@openlb.net .rnrnBestrnMathias

    in reply to: Ship hull drag simulation #2411
    mathias
    Keymaster

    Hi,rnrnYou could implement it in OpenLB. A simple version of a FreeSurface method should not be so complicated to be implemented.But to get physical accurate results in general can be very tricky. There are PhD thesises on it. rnrnBestrnMathias

    mathias
    Keymaster

    Dear Alejandro,rnrn There are several issues to be discussed for that topic. Further, we will have a spring school in March 2017 for LBM and OpenLB, where we can help to get started. Please contact me to proceed.rnrnBestrnMathias

    in reply to: DynSmagorinskyBGKdynamics – Error #2408
    mathias
    Keymaster

    Dear Alejandro,rnrn There are several issues to be discussed for that topic. Further, we will have a spring school in March 2017 for LBM and OpenLB, where we can help to get started. Please contact me to proceed.rnrnBestrnMathias

    in reply to: Advices to simulate turbulent channel flow #2407
    mathias
    Keymaster

    Dear Alejandro,rnrn There are several issues to be discussed for that topic. Further, we will have a spring school in March 2017 for LBM and OpenLB, where we can help to get started. Please contact me to proceed.rnrnBestrnMathias

    in reply to: Advices to simulate turbulent channel flow #2406
    mathias
    Keymaster

    Dear Alejandro,rnrn There are several issues to be discussed for that topic. Further, we will have a spring school in March 2017 for LBM and OpenLB, where we can help to get started. Please contact me to proceed.rnrnBestrnMathias

    in reply to: Poiseuille Profile Test – Diverge #2405
    mathias
    Keymaster

    Dear Alejandro,rnrn There are several issues to be discussed for that topic. Further, we will have a spring school in March 2017 for LBM and OpenLB, where we can help to get started. Please contact me to proceed.rnrnBestrnMathias

    in reply to: Ship hull drag simulation #2404
    mathias
    Keymaster

    Dear Mark,rnrn You can start from cylinder3d or aorta3d. In both cases an stl-file is imported. You may also start from thy venturi3d example. There it is shown how to combine geometry primetive like cones, shperes or cuboids to set up a flow domain. Currently, we do not have a free surface solver. rnrnYou may also consider to come to our spring school in march http://optilb.org/openlb/spring-school-2017 which would help you to get started.rnrnBestrnMathias

    in reply to: Advices to simulate turbulent channel flow #2396
    mathias
    Keymaster

    Hi,rnrn1/ Reduce to about Re=500. Make your case work with ForcedBGK.rn2/ Then, swich using a turbulent model, like Smago with a high SmagoConst. rn3/ Decrease SmagoConst.rnrnBestrnMathias

    mathias
    Keymaster

    Hi,rnrnreplacing “”gettimeofday”” by “”this->gettimeofday”” should work.rnrnBestrnMathias

    in reply to: DynSmagorinskyBGKdynamics – Error #2392
    mathias
    Keymaster

    What did you change “”It should be noted that the smagoConstIsAt attribut have been defined as const static int (before was const static int).””?

    in reply to: DynSmagorinskyBGKdynamics – Error #2391
    mathias
    Keymaster

    Hi,rnrnthe data is in the Cell. As I rememeber, there is a functor (functors/turbulent3d.*) that updates the constant in each cell. There will be a paper and a PhD thesis hopefully soon available on this topic by Patrick Nathan. rnrnBestrnMathias

    in reply to: DynSmagorinskyBGKdynamics – Error #2381
    mathias
    Keymaster

    Did you compile in the mode “”precompiled”” or “”generic””. It should be “”generic””. See documenation. Best Mathias

    mathias
    Keymaster

    It seems a windows/unix problem. I found this put in the beginning “”#define _BSD_SOURCE””. See also http://stackoverflow.com/questions/36901803/gettimeofday-not-declared-in-this-scope-cygwin .

    mathias
    Keymaster

    Googeling I found that someone solved it by putting “”#include <sys/time.h>”” also in the “”timer.hh”” file. Best Mathiasrn

Viewing 15 posts - 466 through 480 (of 616 total)