# Differents between the three DTCHull tutorial and meaning of free trim

 Register Blogs Members List Search Today's Posts Mark Forums Read

 February 16, 2018, 04:48 Differents between the three DTCHull tutorial and meaning of free trim #1 New Member   Raffaele Frontera Join Date: Mar 2017 Posts: 13 Rep Power: 4 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 cyberpr123 likes this.

November 29, 2019, 02:44
#2
New Member

Join Date: Oct 2019
Posts: 8
Rep Power: 2
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 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