Wave-Wake Predictor

Discussion in 'Software' started by Leo Lazauskas, May 24, 2013.

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

    Leo Lazauskas Senior Member

    The Australian Maritime College has made available an empirical prediction
    tool for wave wakes generated by monohulls and catamarans at:

    http://www.amc.edu.au/maritime-engineering/wave-wake-predictor

    A link to the calculator is at the bottom of the web page.
    (Note that the link to the reference publications doesn't work at the
    moment. I have sent the AMC a note to say it needs fixing).

    Please note that I am not connected to the AMC or the wave-wake project.

    In the next version of Michlet and Flotilla I will include calculations of the
    velocity components on the sea-bed which might be helpful to those who
    are interested in the onset of turbidity and other coastal engineering
    applications.
     
  2. Leo Lazauskas
    Joined: Jan 2002
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    Location: Adelaide, South Australia

    Leo Lazauskas Senior Member

    For those who are keen on seeing the publications before the AMC fixes its
    link, here is Macfarlane's PhD thesis which describes the methods and data
    used to build the Wave-Wake Predictor.
     
    Last edited: Aug 12, 2015
  3. PAR
    Joined: Nov 2003
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    Location: Eustis, FL

    PAR Yacht Designer/Builder

    Speed limitations make it's usefulness questionable.
     
  4. Leo Lazauskas
    Joined: Jan 2002
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    Location: Adelaide, South Australia

    Leo Lazauskas Senior Member

    Do you mean speed limitations that are imposed by regulation on some waterways?
    If so, I'd argue that a major objective of the thesis was to come up with
    alternative wave wake regulatory criteria to simple blanket rules on speed
    alone.
     
  5. PAR
    Joined: Nov 2003
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    Location: Eustis, FL

    PAR Yacht Designer/Builder

    The calculator wouldn't run a 20 knot prediction, but did with the same spec's at 10.
     
  6. Leo Lazauskas
    Joined: Jan 2002
    Posts: 2,696
    Likes: 155, Points: 63, Legacy Rep: 2229
    Location: Adelaide, South Australia

    Leo Lazauskas Senior Member

    Thanks, PAR I didn't think it would be quite that constrained.
    It would be useful if they displayed the limitations prominently on the input
    page, and showed where constraints have been violated on the output page.
    Luckily, it's not my problem!
     

  7. Jenny Giles
    Joined: Jul 2009
    Posts: 59
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    Location: Sydney

    Jenny Giles Perpetual Student

    I had a quick play with the page and it does warn users when input is out of range. They still havent fixed the link at the bottom yet but things can get a bit slow down here near the end of semesters. And when it's cold. and every other day too come to think of it.

    I agree with PAR that the predictor is a bit limited. It can't handle tris which is a bit of a pain for us. The thesis is pretty good but i'm wary about the method's ability to predict very far from the boat because of the limited distance the data was collected at, both in the tank and in the field. It has a nice set of experimental data but it's not as good as (free!!!) programs that show the wave pattern.
     
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