CFD Online Logo CFD Online URL
Home > Forums > Siemens


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

LinkBack Thread Tools Display Modes
Old   November 11, 2008, 07:50
Default 6DOF
Posts: n/a
Hi everyone

I need to simulate the steady position of a amphibious vehicle in calm water (buoyancy), and the drag of the vehicle in calm water.

Im pretty sure Star-CCm+s 6DOF can do that.

The question is, Whats the level of difficulty to model a problem like that? I havent seen any tutorial to help me in the Star CCM+ 3.04 user guide…

Im concerned about how difficult is to model (setting the physics correctly), to mesh (how many grid cells?) and converge (is this difficult to converge? How long does it take to run one case???) a problem like that. Besides, what would be a good hardware configuration to run a case like that?

I know that the runtime depends of hardware and mesh refinement for example, but any estimative would be appreciate. I have two months (full time) to work on this.

Thank you in advance
  Reply With Quote

Old   November 11, 2008, 08:21
Default Re: 6DOF
Posts: n/a
I think you would need more than 2months. But it depends on your prevous experience. setting the physics and initial conditions very easy as long as you know these parameters already. meshing does require some experience. especially depending on your problem setup. Good Luck
  Reply With Quote

Old   November 13, 2008, 04:40
Default Re: 6DOF
Posts: n/a
2 months full time is stacks of time from knowing nothing - STAR-CCM+ is very easy to learn and ideal for this case. Here is a link to a video tutorial on doing a ship in 6DOF. This shows everything other than the meshing for such cases:

(NB place the VOF Hydro. press. FF on the outlet!)

If you mesh carefully using a volume source on the water surface with aniso. cells you can have a model with about 300k auto trimmed hexas which will run in a few hours on a modern PC - STAR-CCM+ VOF solver is very efficient.
  Reply With Quote

Old   November 18, 2008, 22:36
Default Re: 6DOF
Posts: n/a
Dear Ping and dear ccm experts,

The memo media is very good material to learn the basic skill for the subject case. It wolud be much appreciated if you can send me the mesh file (ccm) or sim file to try this tutorial. (It is not included in the tutorial material of ccm 3.04.) If it is too big to send by Email, can you post in suit web space or ftp site?

Thanks in advance and best regards
  Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
would someone give me a example of udf for 6DOF? conan FLUENT 3 January 24, 2011 22:10
2D modeling VS 6DOF Jason Siemens 1 April 16, 2009 20:49
Bug in interDyMFoam 6DoF hsieh OpenFOAM Bugs 4 January 26, 2009 08:17
6dof Mike FLUENT 0 May 15, 2008 08:17
about 6dof sam FLUENT 1 February 1, 2006 04:43

All times are GMT -4. The time now is 06:08.