Added Resistance & Power Increase in Waves

Discussion in 'Hydrodynamics and Aerodynamics' started by Erwan, Oct 27, 2012.

  1. DCockey
    Joined: Oct 2009
    Posts: 4,885
    Likes: 424, Points: 83, Legacy Rep: 1485
    Location: Midcoast Maine

    DCockey Senior Member

    Leo may need to comment, but my understanding is Michlet does not give an accurate near-field wave profile. This is inherent due to the assumptions and simplificantions made in the thin ship theory Michlet is based on.

    If you are able to run openFOAM so that you have sufficient confidence in the wave profile and pressure distribution then it would probably be better to optimize based on the drag results from openFOAM. The "low drag" hull shapes from Michlet could be a starting point for the optimization using openFOAM.

    Be aware that one of the risks with CFD such as openFOAM is that it very possible to get very plausible looking but wrong results.

    Where are you located in Michigan? I'm in Rochester Hills north of Detroit.
     

  2. Leo Lazauskas
    Joined: Jan 2002
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    Location: Adelaide, South Australia

    Leo Lazauskas Senior Member

    If I am understanding you correctly, it seems that Doctors and Day tried
    something similar without success. See, for example:
    "Nonlinear Effects on the Squat of a Vessel with a Transom Stern",
    International Workshop on Water Waves and Floating Bodies, 2002.
    http://www.iwwwfb.org/Abstracts/iwwwfb17/iwwwfb17_09.pdf
     
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