CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > CFX

ship modeling

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 26, 2008, 08:48
Default ship modeling
  #1
hsn
Guest
 
Posts: n/a
HI I want to model a ship body. I have decided to make a domain like a tunnel and remove the parts of the ship that is in the water. I want to know that what kind of boundary condition I have to put for the fluid surface to have its dynamic manner? Every clue will be appreciated.

  Reply With Quote

Old   February 26, 2008, 09:54
Default Re: ship modeling
  #2
Fusion
Guest
 
Posts: n/a
Removing the underwater parts of your ship you lose all the information of the interaction with the fluid (eg: drag). It seems that you are interested in results connected to the interaction air-solid only (air drag or similar). In this case you can impose a no-slip boundary condition in the water surface.
  Reply With Quote

Old   February 26, 2008, 17:43
Default Re: ship modeling
  #3
Glenn Horrocks
Guest
 
Posts: n/a
Hi,

It depends on what you are trying to see with the model. If you want to know the ship's trim due to speed or accurate wave drag prediction your only option is to do a multiphase simulation with a free surface. If you are not interested in the wave effects or trim then you can use a no-slip boundary at the water surface as Fusion suggests.

I have also heard a yacht designer doing a simple multiphase model to get the wave pattern then using the water volume only to model the drag effects with the water surface (which now includes waves and troughs) as a no-slip boundary.

Glenn Horrocks
  Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
ship modeling mrji8011 FLUENT 9 August 23, 2011 02:04
FSI modeling of a surface effect ship!!! smn CFX 10 January 26, 2010 17:26
Ship hull modeling on ANSYS CFX V11.0 jorllam CFX 0 August 1, 2007 13:43
May Focus Area: Turbulence Modeling Jonas Larsson CFD-Wiki 0 May 2, 2006 12:48
Modeling Flow/Saturation/Absorption in Fibers Gene Dougherty Main CFD Forum 0 June 6, 2003 15:49


All times are GMT -4. The time now is 05:59.