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by wafi
Sun Mar 24, 2019 9:30 am
Forum: CfdOF / CFD
Topic: Computational Fluid Dynamics (CFD) workbench using OpenFOAM
Replies: 188
Views: 23954

Re: Computational Fluid Dynamics (CFD) workbench using OpenFOAM

btw,
I just downloaded the ihfoam gui, enabling waves based on interfoam, programmed in python. Maybe a possibility for easier implementation additional openfoam features into cfdof wb. Here the link: http://ihfoam.ihcantabria.com/model/gui/

best regards
Peter
by wafi
Sat Mar 23, 2019 7:18 pm
Forum: CfdOF / CFD
Topic: Computational Fluid Dynamics (CFD) workbench using OpenFOAM
Replies: 188
Views: 23954

Re: Computational Fluid Dynamics (CFD) workbench using OpenFOAM

Hi Thomas of cause Marchaj is good. The book, "Seetüchtigkeit der vergessene Faktor" is not my favourite book, in my point of view it is more driven by Fastnet Race 79, whatever, a point to discuss only with some Jever as fuel for discussions :mrgreen: If you are in our area (Schleswig) you`re welco...
by wafi
Sun Mar 17, 2019 8:20 am
Forum: CfdOF / CFD
Topic: Computational Fluid Dynamics (CFD) workbench using OpenFOAM
Replies: 188
Views: 23954

Re: Computational Fluid Dynamics (CFD) workbench using OpenFOAM

Dear all, sorry for late reply, but this week was ... let`s say interesting ... so I just was able to try to check it again since yesterday ... Whatever, Thomas, I agrree that it should work to have the general definition of 0 and a special definition with 1 in an initialation zone ... Unfortunately...
by wafi
Wed Mar 13, 2019 9:28 am
Forum: CfdOF / CFD
Topic: Computational Fluid Dynamics (CFD) workbench using OpenFOAM
Replies: 188
Views: 23954

Re: Computational Fluid Dynamics (CFD) workbench using OpenFOAM

Hi Thomas I think I have managed now the problem to show the water surface including waves. The problem seems to be the meshing of the water surface. If you only use the initialisation zone you are defining with 1/0 the box for water, but that it. I defined now 2 zones, one atmosphere and one water ...
by wafi
Fri Mar 08, 2019 5:18 pm
Forum: CfdOF / CFD
Topic: Computational Fluid Dynamics (CFD) workbench using OpenFOAM
Replies: 188
Views: 23954

Re: Computational Fluid Dynamics (CFD) workbench using OpenFOAM

hm Thomas that`s the way I went also up to now. For the refinement I took 5 layers with cfmesh, to reduce a little bit the calculation time. I used a much bigger cube with 50m length, 30m width, 5m draft plus 2m airdraft to reduce side effects.The velocity with 2,5m/s is a little bit too slow. "Rump...
by wafi
Fri Mar 08, 2019 11:07 am
Forum: CfdOF / CFD
Topic: Computational Fluid Dynamics (CFD) workbench using OpenFOAM
Replies: 188
Views: 23954

Re: Computational Fluid Dynamics (CFD) workbench using OpenFOAM

ah ... forgot ... you can see on which boat you are working on, take a look here: https://yachtwerft-dick.de/index.php?click=werft_boats_ravell Ok ... it is long time ago when I made this design and the last years I only looked into heavy lift problems, but my aim is to go back to yacht design, due ...
by wafi
Fri Mar 08, 2019 11:00 am
Forum: CfdOF / CFD
Topic: Computational Fluid Dynamics (CFD) workbench using OpenFOAM
Replies: 188
Views: 23954

Re: Computational Fluid Dynamics (CFD) workbench using OpenFOAM

hm Thomas the parts above water are not very interesting, I created this file via the gf file (that`s an input file for hydrostatic calculation) and I left the lines above water for testing the model including heeling. The normal way would be to cut the hull above waterline in the situation of heeli...
by wafi
Wed Mar 06, 2019 9:43 pm
Forum: CfdOF / CFD
Topic: Computational Fluid Dynamics (CFD) workbench using OpenFOAM
Replies: 188
Views: 23954

Re: Computational Fluid Dynamics (CFD) workbench using OpenFOAM

hm Thomas will drink a Jever, I heared the rumor that this should improve the nice english or something like that :mrgreen: Skoll 8-) Please note attached, only the hull incl keel and rudder and 15 degree heeling. In general I aggree with your point of view to use freecad as direct input to work wit...
by wafi
Wed Mar 06, 2019 4:56 pm
Forum: CfdOF / CFD
Topic: Computational Fluid Dynamics (CFD) workbench using OpenFOAM
Replies: 188
Views: 23954

Re: Computational Fluid Dynamics (CFD) workbench using OpenFOAM

hm Thomas the flow of cause would be 4,8m/s for my example due to have the max velocity of the boat. The problem indeed is the constant flow around the hull and I think that there must be another trick, if I compare this with the openfoam tutorials as Wigley hull etc. I just trying a new run with in...
by wafi
Tue Mar 05, 2019 7:46 pm
Forum: CfdOF / CFD
Topic: Computational Fluid Dynamics (CFD) workbench using OpenFOAM
Replies: 188
Views: 23954

Re: Computational Fluid Dynamics (CFD) workbench using OpenFOAM

Hi Thomas

it`s more the problem you`ve solved with the pirat in the german forum. I tried to use that example, but it seems that the program changed a little bit.

regards
Peter

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