CFD Online Logo CFD Online URL
Home > Forums > CFX

2D suction in ANSYS CFX 12.1

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

LinkBack Thread Tools Display Modes
Old   June 3, 2010, 04:45
Default 2D suction in ANSYS CFX 12.1
New Member
Join Date: Jun 2010
Posts: 1
Rep Power: 0
Apostolis is on a distinguished road
Hello everyone. I am interested in applying suction on a 2D body (cylinder or airfoil) but I am having trouble defining the suction location. The idea is to select a specific segment along the body's curve, define it as an outlet and apply velocity boundary conditions so I can control the suction velocity. For the cylinder case, I am able to define a circular arc via the split curve command in DesignModeler, however when I proceed to the Mesher and the Setup, the arc is not there i.e. the programm does not recognize it and therefore I cannot apply different conditions on it. Oddly enough, if instead of a circle I design a square and proceed to the Mesher and the Setup, ANSYS recognizes each of the four edges separately and different boundary conditions can be applied on each one. I did found this thread cfx.html but no answer has been given to the guy asking. It sounds really simple, what am I missing? I will appreciate any kind of advice you can give me. Thank you for your time, Apostolis
Apostolis is offline   Reply With Quote

Old   June 3, 2010, 08:01
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 13,993
Rep Power: 107
ghorrocks is a jewel in the roughghorrocks is a jewel in the roughghorrocks is a jewel in the rough
You will have to define the region for suction to be applied in DesignModeller. Cut it out of the full shape and it will come into CFX-Pre as a different surface so you can assign a different boundary to it.

The questions referred to in the link is completely different and asks how do you apply the boundary condition while still retaining a no slip wall. The answer is to use a mass source/sink on a wall boundary, this will do it.
ghorrocks is offline   Reply With Quote



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
how to map resultd from cfx to ansys? ritesh CFX 2 June 1, 2011 07:52
Exporting results from CFX to ANSYS ?? sohail ahmed CFX 1 December 20, 2007 02:10
MFX: weired force transfer from cfx to ansys zyf CFX 3 October 7, 2006 03:08
FSI using CFX and ANSYS Bi Chang CFX 2 May 10, 2005 04:47
ANSYS to acquire CFX Fred FLUENT 0 February 18, 2003 22:04

All times are GMT -4. The time now is 02:02.