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Differents between the three DTCHull tutorial and meaning of free trim

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Old   February 16, 2018, 04:48
Default Differents between the three DTCHull tutorial and meaning of free trim
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Raffaele Frontera
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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,

Raffaele Frontera
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Old   November 29, 2019, 02:44
Question Confusion about DTCHUll
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I have same doubt about the difference between all three examples of DTCHUll. I am new to openfoam. I m using OF-5.
i am asked to calculate resistance and also get the sinkage & trim of vessel and get the simulation for same.


Quote:
Originally Posted by Raffaele Frontera View Post
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,

Raffaele Frontera
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