Openfoam: Differents between the three DTCHull tutorial and meaning of free trim

Discussion in 'Hydrodynamics and Aerodynamics' started by Raffaele Frontera, Feb 16, 2018.

  1. Raffaele Frontera
    Joined: Feb 2018
    Posts: 31
    Likes: 1, Points: 8
    Location: Amsterdam, The Netherlands

    Raffaele Frontera Naval Architect

    Dear Foamers,
    good morning.

    I just made run the tutorial DTCHullWave and the results are within just three steps. I would like to increase the steps, do you know how to do that?

    Talking about the tutorial of DTCHull, at moment are three available for Openfoam 5.x:

    1) DTC Hull using the solver interFoam
    2) DTC Hull using the solver interDyMFoam
    3) DTC Hullwave usign the solver interDyMFoam

    Do you have material where I can read the differents between these 3 tutorials or if you know that, can you be so kind to let me know the differents between them?

    In the explanation of DTCHull available on internet http://www.sourceflux.de/…/upl…/2014...r_vol50no3.pdf there is a point where it says:. "The hull was ballasted at the design draft 14.5 m with zero trim, and was free in trim and sinkage".
    Which make me a bit confuse because I don't understand if this condition is valid for all the tutorials of DTCHULL available for OpenFoam 5.
    I also would like to understand the meaning of this sentence because if as boundary condition there is zero trim and then it is possible to have a free trim afterwards, then why the vessel it doesn't move for the DTCHull interFoam and for the DTCHull InterDyMFoam (which I expect that the vessel can sinkage)?

    Thank you in advance, [​IMG]

    Raffaele Frontera
     
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