CFD and potential flow software

Discussion in 'Hydrodynamics and Aerodynamics' started by Vinassman, May 15, 2012.

  1. Vinassman
    Joined: Mar 2011
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    Vinassman Junior Member

    Dear all,

    I am looking for open source / freeware for CFD and potential flow, do you have any reference? It can be for either Linux or Windows, it's ok.

    I know there is numerous of CFD software but i have to admit i am a bit lost...

    Range of application will be slow vessel (Fn below 0.200) with low L/B ratio (around 4).

    Thanks in advance. Cheers
     
  2. klaas
    Joined: Feb 2009
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    klaas Junior Member

    try openfoam
     
  3. sottorf
    Joined: Sep 2007
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    sottorf member

    you are fortunate that your problem Fn<0.2 is is good speed range for application of CFD methods. I agree with Klaas that if you want to go for a full RANS solver then OpenFoam is you best bet. I saw a recent study comparing the results of different RANS codes and OpenFOAM came out best. See picture.

    Regarding panel codes, I know the Institute fuer Schiffbau, Technical University of Hamburg-Harburg (TUHH), have a very good panel code. You could try talking to them. Not sure if they would give it out.

    The only other option I have for you is Autowing, vortex lattice code. It was originally developed for high speed ships but the last version has a non-linear free surface boundary condition incorporated.

    You might be better off posting this question on one of the dedicated CFD forums.
     

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  4. CWTeebs
    Joined: Apr 2011
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    CWTeebs AnomalyGenerator

    Autowing may be inadequate/inappropriate for the OP's seakeeping analysis.
     
  5. sottorf
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    sottorf member

    yes correct. Autowing will only handle steady state conditions.
     
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  6. CWTeebs
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    CWTeebs AnomalyGenerator

    Don't get me wrong though, it looks interesting nevertheless (I'd not heard of it before, so thanks for sharing).
     
  7. Vinassman
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    Vinassman Junior Member

    Thanks all for your good suggestion. Regarding OpenFoam, is there any free GUI?
     
  8. daiquiri
    Joined: May 2004
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    Location: Italy (Garda Lake) and Croatia (Istria)

    daiquiri Engineering and Design

    GUI, pre and post-processing etc. - all in one package: http://www.ods-engineering.com/
     
  9. CWTeebs
    Joined: Apr 2011
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    CWTeebs AnomalyGenerator

    Unfortunately that is not free. The site forces you to create an account to download anything, and at the bottom of the download page it says: "Note: ODS Studio is currently only available through commercial subscription in order to support further development. To obtain a commercial license please contact us for a quote."

    Would have been nice if it'd stated that up front.

    Anyway, you might want to look into CAELinux, which includes OpenFOAM, a simple wizard to get you started creating your own OpenFOAM simulations, and a suite of other tools for CAD, FEA, etc. There's some tutorials on YouTube:

    http://www.youtube.com/results?sear....0.0.0.0.223.1039.1j3j2.6.0...0.0.F1DDF6jhRFE
     
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  10. Vinassman
    Joined: Mar 2011
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    Vinassman Junior Member

    Dear CWTeebs,

    Thanks for the information, I will have a look at CAE Linux, sounds good!

    Cheers.
     
  11. quequen
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    quequen Senior Member

    newbie question, sorry: from the attached picture, wich one is the OpenFOAM one? And what should we see there that makes the difference? (they look all the same for me :?::rolleyes:)
     
  12. sottorf
    Joined: Sep 2007
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    sottorf member

    OpenFoam is the colour image. On the opposite side is actual measurements. If you look closely at the wave contours you will see that the other codes do not reproduces the wave patterns as accurately as openFoam does.
     

  13. quequen
    Joined: Jul 2009
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    quequen Senior Member

    Thanks, now I see. I guess level curves are related to LOA...
     
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