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

CFX 2D ANALYSIS BOUNDARY CONDITION

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

Reply
 
LinkBack Thread Tools Display Modes
Old   February 19, 2008, 11:42
Default CFX 2D ANALYSIS BOUNDARY CONDITION
  #1
fat bug
Guest
 
Posts: n/a
I found out that the way to do 2d analysis in CFX is to make 1 layer extruded mesh. The documentation of CFX says we can use something like a 20 Portion of a axisymetrical model. My question is, when setting up boundary condition in this case, should I still do a inlet volume flow rate and divide the original number by 9 (according to the model size), or would I have to use the velocity as boundary condition.

Thanks!
  Reply With Quote

Old   February 19, 2008, 17:22
Default Re: CFX 2D ANALYSIS BOUNDARY CONDITION
  #2
Glenn Horrocks
Guest
 
Posts: n/a
Hi,

Don't use a 20 degree portion, use a portion less than 5 degrees, or 1 or 2 degrees if you want to be super-accurate.

Yes, you need to scale mass flows by the ratio of the inlet sector to the full real inlet area. For a 2 degree sector the scale factor is then 180.

Glenn Horrocks
  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
Wind turbine simulation Saturn CFX 34 October 16, 2014 05:27
mixed inflow/outflow downstream boundary condition question peob OpenFOAM Running, Solving & CFD 2 August 14, 2014 09:07
inlet velocity boundary condition murali CFX 5 August 3, 2012 08:56
External Radiation Boundary Condition (Two sided wall), Grid Interface CFD XUE FLUENT 0 July 8, 2010 06:49
CFX 5.5 Boundary condition Veebs CFX 5 May 19, 2002 20:55


All times are GMT -4. The time now is 16:32.