CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > CD-adapco

DNS in STAR-CD

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 16, 2003, 00:51
Default DNS in STAR-CD
  #1
john
Guest
 
Posts: n/a
Hi Experts, In star CD how to switch on DNS? Thanks in advance.
  Reply With Quote

Old   December 16, 2003, 05:49
Default Re: DNS in STAR-CD
  #2
Joel
Guest
 
Posts: n/a
The obvious question is why do you want to in the first place, its not just a case of "switching DNS on". If you want to be studying direct numerical simulation then i wouldnt say that Star is the best tool to be doing it with!
  Reply With Quote

Old   December 17, 2003, 01:32
Default Re: DNS in STAR-CD
  #3
john
Guest
 
Posts: n/a
Hi Joel, I read in literature that for doing aero acoustic analysis LES or DNS are good. So I want to do it in STAR CD. fairly good accuracy is enough for me. I do not have any other software. If I switch over to LES model it is not running. I am using crank-nicolson and CD scheme. It give me error that you should switch it to transient, even though I did it.

Thanks in advance.
  Reply With Quote

Old   December 17, 2003, 05:02
Default Re: DNS in STAR-CD
  #4
Joel
Guest
 
Posts: n/a
I think it is more a confusion of definitions in your case, DNS involves complete numerical simulation without the need for turbulence models by refining the grid to the smallest length scales and as such has (at the moment) no real practical usage due to the enourmous computer resources and time involved so unless you have a supercomputer and a year or two of free time you may wish to try something else!! So in your case LES may be the way to go, unfortunately i dont have any experience using LES with Star so you may wish to speak to tech support or wait till someone on here comes along who does.
  Reply With Quote

Old   January 8, 2004, 13:49
Default Re: DNS in STAR-CD
  #5
Yacine
Guest
 
Posts: n/a
read my reply to the LES question
  Reply With Quote

Reply

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
how to export a mesh from star design to star cd aounallah CD-adapco 4 March 6, 2009 07:22
Star Design to Star-CD(Prostar) AB CD-adapco 5 October 28, 2004 12:21


All times are GMT -4. The time now is 12:58.