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

Negative volume in mesh due to contact

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

Reply
 
LinkBack Thread Tools Display Modes
Old   September 9, 2015, 15:28
Default Negative volume in mesh due to contact
  #1
New Member
 
Ahmed Jalal
Join Date: Mar 2015
Posts: 19
Rep Power: 3
A.Jalal is on a distinguished road
I am simulating a ball inside a valve that its motion is determined by a UDF.

When the ball gets close to the wall I get errors about negative volumes. I tried refining the mesh, decreasing the time step, improving Flow Courant Number and relaxation factors. Also, I added the contact detection specifying the boundaries but I still get the same error.

Do I need to compile a UDF for the contact detection?

If so, any advice or push in the right direction would be appreciated.

Thanks
Attached Files
File Type: docx Valve.docx (121.4 KB, 10 views)
A.Jalal is offline   Reply With Quote

Reply

Tags
contact detection, dynamic mesh, negative volume error, udf

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
Mixer mesh - negative volume problem jadtwo OpenFOAM Native Meshers: blockMesh 2 November 6, 2014 17:37
Negative Volume during Mesh Motion Analysis giov_ingr FLUENT 2 December 13, 2013 07:09
Negative volume in moving mesh mvee FLUENT 5 September 30, 2011 12:56
negative volume found in es-ice mesh lizhihua CD-adapco 1 August 4, 2007 04:39
Icemcfd 11: Loss of mesh from surface mesh option? Joe CFX 2 March 26, 2007 18:10


All times are GMT -4. The time now is 18:51.