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

CFD basics

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

Reply
 
LinkBack Thread Tools Display Modes
Old   November 6, 2012, 07:02
Default CFD basics
  #1
New Member
 
Prateek
Join Date: Mar 2012
Location: Mumbai
Posts: 29
Rep Power: 5
Prateek garg is on a distinguished road
Hi,

Can someone please help me explaining: Why grids with high number of cells (3 millions) require very small timestep size? and How could I determine that how many number of iteration per time step is required for solution to converge?
Prateek garg is offline   Reply With Quote

Old   November 6, 2012, 09:58
Default
  #2
Senior Member
 
Chris DeGroot
Join Date: Nov 2011
Location: Canada
Posts: 387
Rep Power: 6
cdegroot is on a distinguished road
Assuming you are talking about an explicit time marching method, it is because of the CFL condition: http://en.wikipedia.org/wiki/Courant...Lewy_condition.
cdegroot is offline   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
re cfd basics rajesh Main CFD Forum 2 July 16, 2007 13:44
CFD basics... rohan CFX 1 January 25, 2006 03:01
CFD salary dan collen Main CFD Forum 5 August 22, 2001 09:56
basics in cfd tonshal Main CFD Forum 7 November 30, 1999 05:04
Which is better to develop in-house CFD code or to buy a available CFD package. Tareq Al-shaalan Main CFD Forum 10 June 12, 1999 23:27


All times are GMT -4. The time now is 16:04.