CFD Online Logo CFD Online URL
Home > Forums > General Forums > Main CFD Forum

Numerical error in tetrahedral cells

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

LinkBack Thread Tools Search this Thread Display Modes
Old   February 14, 2009, 13:57
Default Numerical error in tetrahedral cells
Posts: n/a

I have read some quotes on meshing schemes and corressponding problems and accuracy.

However, I have observed in my studies that for pure tetrahedral meshes, there exists a threshold beyond which the solution will be further away from the analytical value than the previous or coarser mesh.

1. Do you think that is possible?

2. do you think that this happens due to the fact that numerical error for tetrahedral cells increases exponentially leading to a condition that any further discretization will only take you away from the analytical solution? (in other words the numerical error due to the tetrahedral cells is much higher than the improvement in the solution due to further discretization in the form more tet cells)

Kindly reply and thank you for yout time and thoughts.

Best regards Sam
  Reply With Quote

Old   February 14, 2009, 14:51
Default Re: Numerical error in tetrahedral cells
Posts: n/a
search for cell Peclet number, some authors call it local Reynolds number.
  Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
[Netgen] Import netgen mesh to OpenFOAM hsieh OpenFOAM Meshing & Mesh Conversion 32 September 13, 2011 05:50
[snappyHexMesh] snappyHexMesh won't work - zeros everywhere! sc298 OpenFOAM Meshing & Mesh Conversion 2 March 27, 2011 21:11
[snappyHexMesh] snappyHexMesh aborting Tobi OpenFOAM Meshing & Mesh Conversion 0 November 10, 2010 03:23
Numerical error in tetrahedral cells Sam Main CFD Forum 1 February 17, 2009 17:18
physical boundary error!! kris Siemens 2 August 3, 2005 00:32

All times are GMT -4. The time now is 04:40.