Forum: OpenFOAM Running, Solving & CFD
June 24, 2013, 12:01
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Replies: 322
Views: 100,069
Tim,
This sounds like a refinement issue (to...
Tim,
This sounds like a refinement issue (to capture wave details, check if waves are described by at least 10-15 cells) or a difference in trim/sinkage which can cause significant differences. As...
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Forum: OpenFOAM Running, Solving & CFD
June 23, 2013, 15:46
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Replies: 322
Views: 100,069
Hi Tim,
First of all it would be interesting...
Hi Tim,
First of all it would be interesting to see the relation of error in comparison with the total resistance. Furthermore, since you have model experiments and an estimated wetted area, you...
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Forum: OpenFOAM Running, Solving & CFD
May 30, 2013, 08:18
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Replies: 322
Views: 100,069
Kilroy,
I think the mesh is too coarse...
Kilroy,
I think the mesh is too coarse resulting in no viscous damping and possibly a time step for the calculations which is too large. So you have 2 options:
-decrease cell size near your ship...
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Forum: OpenFOAM Running, Solving & CFD
May 22, 2013, 17:04
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Replies: 322
Views: 100,069
Carlos,
Nice to see your involvement. I'm...
Carlos,
Nice to see your involvement. I'm using a modified version of shipFoam. The mesh in the video is a bit coarse since I haven't unlimited computation power. At that time only trim was...
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Forum: OpenFOAM Running, Solving & CFD
May 22, 2013, 12:32
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Replies: 322
Views: 100,069
Hi all,
Just because I'm curious....does...
Hi all,
Just because I'm curious....does anyone over here, other than myself, has a working OF development in which a sailing ship can be simulated?
@Kilroy: I'm sorry, I'm not really familiar...
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Forum: OpenFOAM Running, Solving & CFD
February 19, 2013, 05:54
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Replies: 322
Views: 100,069
Hi Sony,
Right now you're posting in the...
Hi Sony,
Right now you're posting in the OpenFOAM part of the forum...maybe you have more luck finding the answer that you need in the CFX forum?
Could you also remove one (of your two) post...
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Forum: OpenFOAM Running, Solving & CFD
February 4, 2013, 14:48
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Replies: 322
Views: 100,069
@Hs: did you also checked your BC's? When...
@Hs: did you also checked your BC's? When checkmesh is okay the error must be somewhere else....
@Ali: Check google for navyFoam of shipFoam...both for OF16. Certainly use interFoam as a basis...
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Forum: OpenFOAM Running, Solving & CFD
February 3, 2013, 06:18
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Replies: 322
Views: 100,069
Hey Hs,
You can see in the output that alpha1...
Hey Hs,
You can see in the output that alpha1 is not behaving well, the min/max value are way beyond the range of [0-1]. Did you used setFields to 'fill' your domain and what are you trying to...
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Forum: OpenFOAM Running, Solving & CFD
January 27, 2013, 14:40
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Replies: 322
Views: 100,069
Dear Ali,
I'm not sure if Eric will read...
Dear Ali,
I'm not sure if Eric will read your post, but the latest version of OF21 has a Wigley hull tutorial included in the LTSInterFOAM solver I think. Is that what you're looking for?
Ralph
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Forum: OpenFOAM Running, Solving & CFD
October 8, 2012, 06:05
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Replies: 322
Views: 100,069
James,
Everything is possible in OF.... if...
James,
Everything is possible in OF.... if you have enough time! Most of the stuff you need is indeed already available somewhere, but it takes a lot of effort to combine and check.
I even...
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Forum: OpenFOAM Running, Solving & CFD
October 8, 2012, 04:24
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Replies: 322
Views: 100,069
Hi James,
In that case I think you should...
Hi James,
In that case I think you should change your plans.... currently there are only between two-five OF-solvers in the world capable of simulating a moving ship and none of them are...
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Forum: OpenFOAM Running, Solving & CFD
October 8, 2012, 02:20
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Replies: 322
Views: 100,069
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Forum: OpenFOAM Running, Solving & CFD
May 31, 2012, 04:12
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Replies: 322
Views: 100,069
Try a different mesh with less cells in the...
Try a different mesh with less cells in the stream direction (at least at the free surface) or more cells in transverse direction (or a combination of both :D). In the way you'll change the cells...
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Forum: OpenFOAM Running, Solving & CFD
March 3, 2012, 12:22
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Replies: 322
Views: 100,069
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Forum: OpenFOAM Running, Solving & CFD
November 22, 2011, 04:57
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Replies: 322
Views: 100,069
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Forum: OpenFOAM Running, Solving & CFD
August 31, 2011, 03:36
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Replies: 322
Views: 100,069
Hello Luc,
I'm sorry, I missed your point...
Hello Luc,
I'm sorry, I missed your point in your previous post.... I guess I was a bit tired yesterday. Unfortunately I have no experience with the mesh refinement option!
Regards,
Ralph
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Forum: OpenFOAM Running, Solving & CFD
August 30, 2011, 13:53
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Replies: 322
Views: 100,069
Hello Luc,
You can see some examples for...
Hello Luc,
You can see some examples for both dictionaries (placed under "constant") below. I think there might also some tutorials for moving meshes.
An explanation of the shipDict-file can...
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Forum: OpenFOAM Running, Solving & CFD
August 17, 2011, 01:46
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Replies: 322
Views: 100,069
I should have consulted this forum before I...
I should have consulted this forum before I started working around in shipFoam :(
Ben; I think that OF1.7 and 2.0 are using the same terms. The reason that the original shipfoam is not working...
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Forum: OpenFOAM Running, Solving & CFD
August 16, 2011, 14:02
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Replies: 322
Views: 100,069
Bonjour Ben,
Theoretically you just have to...
Bonjour Ben,
Theoretically you just have to rewrite shipFoam to shipFoam for OF1.7 by changing the pressure terms from p or pd to p_rgh. I tried that but probably messed up the code too much.
...
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Forum: OpenFOAM Running, Solving & CFD
August 13, 2011, 04:41
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Replies: 322
Views: 100,069
Hello Ben,
ShipFoam is indeed running on...
Hello Ben,
ShipFoam is indeed running on OF1.6 but it is not very difficult to run both OF1.6 and OF1.7 and OF2.0 on the same computer. Just add the following lines to the bottom of the bashrc...
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Forum: OpenFOAM Running, Solving & CFD
August 10, 2011, 09:29
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Replies: 322
Views: 100,069
Vincent,
You are seeing the same as Ben...
Vincent,
You are seeing the same as Ben did earlier. At the moment try to stretch the cells in x-direction (simply by defining less cells in the blockMeshDict in x-direction). This will smoothen...
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Forum: OpenFOAM Running, Solving & CFD
August 9, 2011, 16:16
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Replies: 322
Views: 100,069
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Forum: OpenFOAM Running, Solving & CFD
August 9, 2011, 06:48
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Replies: 322
Views: 100,069
Hello Ben,
You could do that, but I'd...
Hello Ben,
You could do that, but I'd suggest that you change the dynamicMeshDict (under constant). I thought that it must be possible to change the input there (not sure).
Another option...
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Forum: OpenFOAM Running, Solving & CFD
August 9, 2011, 06:19
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Replies: 322
Views: 100,069
Hello Ben,
I'm afraid that your problem is...
Hello Ben,
I'm afraid that your problem is a general problem within OF and its multiphase solvers. I had these problems too and so far I know there are no proper outlet BCs. Colin Barth (also...
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Forum: OpenFOAM Running, Solving & CFD
August 5, 2011, 15:41
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Replies: 322
Views: 100,069
Hi Dave,
I tried a lot with meshing and the...
Hi Dave,
I tried a lot with meshing and the different solvers but I didn't had a look into the point that you mention. At this point I've had it with sHM; I want more control over the boundary...
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