# checker board at free-surface

 User Name Remember Me Password
 Register Blogs Members List Search Today's Posts Mark Forums Read

 LinkBack Thread Tools Display Modes
 September 17, 2001, 06:56 checker board at free-surface #1 name Guest   Posts: n/a at free-surface interface... because of defferent density, vertical directional velocity (3D) distribution has checker board problem. my scheme is SIMPLE, HRIC, ... Can I fix that ?

 September 17, 2001, 12:01 Re: checker board at free-surface #2 Mr. Babble Guest   Posts: n/a What is your density ratio. Are you using a conservative or non-conservative form of the equations. Are you using surface tension? Is it large? If you look at your pressure correction equation and you see that you have density within it, there is a way to take it out. Just derive the pressure correction equation and try and cancel out the density. It will. This may be only half your problem. I don't really know. At free surfaces the surface tension force puts a discontinuity in pressure. If you have a good discontinuous coefficient solver than you should be ok. I.e. maybe multigrid. If not then your solver will try and smooth out your pressure discontinuity and place the discontinuity on the velocity field. To solve this , well I don't know, but my best quess would be to look at the solver. Ie. throw out stone

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post mechovator CFX 24 April 8, 2011 00:41 therockyy FLOW-3D 1 June 20, 2010 19:36 samwh CFX 7 August 30, 2009 07:14 Luis CFX 8 May 29, 2007 18:13 Elliot Schwartz Main CFD Forum 5 August 25, 1998 21:03

All times are GMT -4. The time now is 22:02.

 Contact Us - CFD Online - Privacy Statement - Top