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

Fan boundary condition in CFX?

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

Reply
 
LinkBack Thread Tools Display Modes
Old   January 14, 2012, 14:11
Default Fan boundary condition in CFX?
  #1
New Member
 
Amit Agasty
Join Date: Oct 2011
Location: CLZ, Deutschland
Posts: 15
Rep Power: 7
agastyamit is on a distinguished road
Hi
can anyone please tell me how can i implement a fan boundary condition (as is present in Fluent) in CFX?

and also is it somehow possible to implement it somewhere in the fluid domain?

Thanks
agastyamit is offline   Reply With Quote

Old   January 14, 2012, 20:02
Default
  #2
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 13,193
Rep Power: 102
ghorrocks is a jewel in the roughghorrocks is a jewel in the roughghorrocks is a jewel in the rough
The fan BC will just be some function of velocity and pressure and you can impose this as a CEL expression.

There has been plenty of posts on the forum about how to implement fan curves, this may be of use.
ghorrocks is offline   Reply With Quote

Old   November 21, 2016, 14:05
Default
  #3
New Member
 
neha sharma
Join Date: Oct 2016
Posts: 6
Rep Power: 2
neha03sharma is on a distinguished road
Hello Glenn,

I have to model a fan inside a domain in cfx. can you please send the link of post where I can find more information about fan curves
neha03sharma is offline   Reply With Quote

Old   November 21, 2016, 16:55
Default
  #4
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 13,193
Rep Power: 102
ghorrocks is a jewel in the roughghorrocks is a jewel in the roughghorrocks is a jewel in the rough
Have you googled fan curve?
ghorrocks is offline   Reply With Quote

Old   November 30, 2016, 14:31
Default
  #5
New Member
 
neha sharma
Join Date: Oct 2016
Posts: 6
Rep Power: 2
neha03sharma is on a distinguished road
Hello Glenn,

I looked for the material available online. I am able to simulate the fan, however my fan is not aligned to any global co-ordinate but is rotated about x axis. So, while adding the momentum term, I should add components in both y and z directions proportional to the angle that fan axis make with z and y axis?
neha03sharma is offline   Reply With Quote

Old   November 30, 2016, 18:17
Default
  #6
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 13,193
Rep Power: 102
ghorrocks is a jewel in the roughghorrocks is a jewel in the roughghorrocks is a jewel in the rough
Then you simply work out the components in the xyz axes. This is basic vectors.
ghorrocks is offline   Reply With Quote

Old   December 1, 2016, 08:30
Default
  #7
Senior Member
 
Join Date: Feb 2011
Posts: 457
Rep Power: 11
Antanas is on a distinguished road
Quote:
Originally Posted by neha03sharma View Post
Hello Glenn,

I looked for the material available online. I am able to simulate the fan, however my fan is not aligned to any global co-ordinate but is rotated about x axis. So, while adding the momentum term, I should add components in both y and z directions proportional to the angle that fan axis make with z and y axis?
Maybe I don't really understand your question, but just in case, you can create additional coordinate system based on your fan and specify velocity relative to it.
Antanas 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
inlet velocity boundary condition murali CFX 5 August 3, 2012 08:56
Boundary Condition in CFX ssbear ANSYS 1 February 1, 2011 21:43
asking for Boundary condition in FLUENT Destry FLUENT 0 July 27, 2010 00:55
CFX doesn't continue calculation... mactech001 CFX 6 November 15, 2009 22:25
Fan Boundary Condition Vijay FLUENT 0 February 13, 2009 15:45


All times are GMT -4. The time now is 12:45.