CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > CFX

Free Surface

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

LinkBack Thread Tools Search this Thread Display Modes
Old   January 2, 2006, 06:26
Default Free Surface
Posts: n/a
Hi, I'm trying to get a correct wave profile along a ship hull but, although the general shape is correct, still I got a wave crest near the bow which is double than what measured in model tests.

Here is my coputational data: Ship lenght l=128 m Ship speed u=13.88 m/s Lenght scale 1:20 Domain shape: 1/4 cylinder - 1 ship lenght forward of ship bow, 2 ship lenght aft of ship stern and 1.6 ship lenght cylinder radius.

I have left 10 m of air (in full scale) above still sea surface.

Boundary conditions: similar to the one used in the tutorial "Free surface flow over a bump" with few exceptions.

Reference pressure = 1 [atm]- rho * g * z * VFWater

After few computations I noticed that I always obtain some dirt close to the lateral boundary (where it seems that an opening works better than a free slip wall) that probably affects the wave close to the hull.

Many thanks to anybody could give me a hint


  Reply With Quote


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
Free surface is below than expected..results are not good mechovator CFX 24 April 8, 2011 00:41
Submarine Free Surface samwh CFX 7 August 30, 2009 07:14
Multiphase flow. Dispersed and free surface model Luis CFX 8 May 29, 2007 18:13
Equilibrium of a free surface under surface tensio Ryan Main CFD Forum 1 August 7, 2001 16:14
Modeling Free Surface Flows Elliot Schwartz Main CFD Forum 5 August 25, 1998 21:03

All times are GMT -4. The time now is 01:21.