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

larger blend factor or high resolution ?

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 4, 2008, 18:37
Default larger blend factor or high resolution ?
  #1
amine
Guest
 
Posts: n/a
Hi

i've read on the tutorial that to get a good result ,i should use a blend factor of at least 0.75 or high resolution,which is more accurate the high resolution or the blend factor of 0.75,if it's the high resolution which value of the blend factor would be more accurate than it.

thanks
  Reply With Quote

Old   March 4, 2008, 20:14
Default Re: larger blend factor or high resolution ?
  #2
Glenn Horrocks
Guest
 
Posts: n/a
Hi,

Problem dependant. For some simulations the high res scheme does not work too well. High res looks at the local variable field and estimates the amount of second order it can use to minimise over/undershoot. This works pretty well for compressible flows with shock waves and the like but not so well for simulations with buoyancy.

Glenn Horrocks
  Reply With Quote

Old   March 4, 2008, 21:28
Default Re: larger blend factor or high resolution ?
  #3
Rogerio Fernandes Brito
Guest
 
Posts: n/a
I think that you must make a comparison with experimental data! Untill nowadays, i could take good results with cfx11 (or 5.6) on heating conducting problems. At least, with tetra mesh. i WILL still test hexa mesh.
  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
[CFD-Post] High resolution scheme blend factor siw CFX 5 May 26, 2011 17:23
Numerical Weather Modelling : Time and space resolution issues chriswatt Main CFD Forum 0 February 15, 2011 22:32
how to understand high resolution scheme and high order scheme iilw1314 Main CFD Forum 3 September 30, 2010 10:43
High order scheme vs Specified Blend factor 1 realanony87 CFX 0 June 19, 2009 06:58
Large difference in grid resolution for diff paper Ben Main CFD Forum 16 April 7, 2007 11:45


All times are GMT -4. The time now is 03:18.