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

Symmetry

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

Reply
 
LinkBack Thread Tools Display Modes
Old   May 22, 2011, 07:25
Default Symmetry
  #1
New Member
 
Saravanakumar
Join Date: Apr 2010
Location: Bangalore
Posts: 9
Rep Power: 7
saravana is on a distinguished road
Hi All,

I need to do cfx simulation for Impellar type fuel pump.
It has five domains.
1. Inlet Domain (unsymmetry)
2. Axial Clearance - Inlet side Domain (symmetry)
3. Blades Domain (35 fluid blade volumes spread out for 360)
4. Axial clearancee - Outlet side Domain (symmetry)
5. Outlet Domain (unsymmetry)

Both in the top and bottom extreme (Inlet and outlet Domain) is circular sector volume and is not a symmetric geometry.
Next to those domains is axial clearances, which is a symmetric (complete circular volume).
In between these axial clearances, 35 impeller blade fluid volumes spread out for comple 360.

My question here is that, is it possible to simplify the model with only one blades instead of complete 35 blades, considering the fact that the domains these blades is going to have domain interface (Axial clearances) is uniform for 360. But the other two domains (inlet & Outlet) are not symmetry.

Please give your suggestions.
saravana is offline   Reply With Quote

Old   May 22, 2011, 19:53
Default
  #2
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 10,832
Rep Power: 85
ghorrocks has a spectacular aura aboutghorrocks has a spectacular aura aboutghorrocks has a spectacular aura about
Most fuel pumps I have seen use positive displacement. You cannot model this using rotating frames of reference. The immersed grid approach is a better way.
ghorrocks 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
[ICEM] Blocking and Symmetry BrolY ANSYS Meshing & Geometry 32 August 24, 2012 03:13
Properly using symmetry with both CFX and ANSYS workbench for a FSI analysis, help! Cirion0000 CFX 0 July 6, 2009 14:26
Forces in Symmetry Matt CFX 2 February 25, 2009 06:41
radiation and symmetry Mark FLUENT 2 November 4, 2004 14:50
Need desperate help again: Symmetry problem!! Deadly FLUENT 0 August 22, 2002 04:56


All times are GMT -4. The time now is 08:37.