CFD Online Logo CFD Online URL
Home > Forums > Autodesk Simulation CFD

Easy calculation fails

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

LinkBack Thread Tools Display Modes
Old   October 31, 2012, 10:48
Question Easy calculation fails
New Member
Join Date: Oct 2012
Posts: 1
Rep Power: 0
Fluidguy is on a distinguished road
Hello guys,

I am having a problem with CFD. I am trying to figure out what boundary conditions I have to use if I want to get a propper image of air flowing through a tube. In the tube I added a aperture to raise the preassure at the front and get a higher speed at the exit of my aperture. The boundary conditions I am using at the moment are:

speed: 10m/s
pressure at the entrance: 0,2Bar = 20mBar excess hydrostatic pressure

I dont want to define any conditions for the area behind the aperture. Let's say I don't know anything about this area and I want my PC to solve this task/fiction of mine. I want him to show me what speed/pressure I would get at/behind my aperture, with this szenario of mine.

The thing is, if I am not able to create these easy tasks and get propper answers, I will never be able to understand even more complexe structures. So that's why I want to understand the basics.

I hope someone can help me with my problem.

Thanks a lot in advance,
Fluidguy is offline   Reply With Quote

Old   January 4, 2013, 12:19
Default RE: Easy calculation fails
New Member
Matt Brown
Join Date: Jan 2013
Posts: 17
Rep Power: 4 is on a distinguished road
Can you clarify what you mean by 'proper image of air flowing through a tube'? Are we talking about velocity distribution, streamlines, pathlines, pressure distribution, etc?

Can you post a screenshot or two of your geometry? I am not following your description.

Matt is offline   Reply With Quote


aperture, basic, tube

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
MRF and Heat transfer calculation Susan YU FLUENT 0 June 2, 2010 08:46
Defining output as input for second calculation mannobot FLUENT 1 June 2, 2010 04:20
Grid check fails after sliding mesh calculation Tito FLUENT 0 March 3, 2008 15:28
Easy way for a last output at the end of an calculation andimb OpenFOAM 1 April 28, 2006 04:21
Warning 097- AB CD-adapco 6 November 15, 2004 05:41

All times are GMT -4. The time now is 07:21.