CFD Online Logo CFD Online URL
Home > Forums > FloEFD, FloWorks & FloTHERM

Checking Geometry

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

LinkBack Thread Tools Display Modes
Old   March 12, 2012, 23:40
Post Checking Geometry
New Member
WookJin Kim
Join Date: Feb 2012
Posts: 23
Rep Power: 5
JosephKim is on a distinguished road
I analyse a cabinet by internal analysis type.
Next, I create Lids and check the Geometry Fluid Volume.
But Fluid Volume can not be produced.

I can't find open spaces because of cabinet's big size.

If and when the method exist to find open space easily, please let me know..
JosephKim is offline   Reply With Quote

Old   March 16, 2012, 08:59
Senior Member
Boris Marovic
Join Date: Jul 2009
Posts: 408
Rep Power: 13
Boris_M is on a distinguished road
Hi Joseph,
there is a way you can try to find if you have just an open gap somewhere so the internal space is not found or if an invalid contact is causing the problem.
If you switch to external and there is no invalid contact, then you should be able to find the fluid volume. If that doesn't work you have an invalid contact.

If ther is no invalid contact you can find the gap in two ways:
Use an external analysis and reduce the computational domain just a little larger than your model. Use a higher massflow or pressure boundary condition on any face of your model, just to have a flow source and start the calculation with a coarser mesh as you don't care about the details and result accuracy. After a while you can stop the calculation and plot either trajectories beginning on your boundary condition or use a cut plot and move it through your model and look from all angles if there is a high flow coming out of your geometry somewhere.

Use a solid thin block that seperates the model into two halves. Then check the volum again in an internal analysis. If you found one side, move the block bit by bit through the model till the volume vanishes. If that happened you just crossed the point where a gap is that cause the detection to not find an internal volume. You can also use two more such blocks cutting your model into 8 sections and therefore find the section where no volume is and move the blocks accodingly along x, y and z to narrow the location down to the point where the gap is.

Boris_M is offline   Reply With Quote

Old   March 20, 2012, 01:09
New Member
WookJin Kim
Join Date: Feb 2012
Posts: 23
Rep Power: 5
JosephKim is on a distinguished road
Thank you Boris
Your idea is amazing!
I will try that you teach me. I expect that will have good result.
JosephKim 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
critical error during installation of openfoam Fabio88 OpenFOAM Installation 21 June 2, 2010 03:01
Problems in compiling paraview in Suse 10.3 platform chiven OpenFOAM Installation 3 December 1, 2009 08:21
OpenFOAM installation problem on Linux 32bit kumar OpenFOAM Installation 0 April 27, 2007 05:41
Help%7e%7einstall openfoam13 on fc5%7e%7e aderliner OpenFOAM Installation 2 September 11, 2006 07:24
Gerris software installation mer Main CFD Forum 2 November 12, 2005 09:50

All times are GMT -4. The time now is 03:10.