CFD Online Logo CFD Online URL
Home > Forums > Mesh Generation & Pre-Processing

Mesh cells type most suitable for CFD

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

LinkBack Thread Tools Display Modes
Old   April 6, 2013, 10:43
Default Mesh cells type most suitable for CFD
New Member
Roman Voronov
Join Date: May 2010
Location: Russia
Posts: 13
Rep Power: 9
rv82 is on a distinguished road
Hi friends! What is the most suitable and optimal mesh cells type for CFD? I read somewhere that tri-prisms and tet elements are worst for CFD computation. But my case contains that elements, about 20% of all mesh. Is it bad? I can exchange them by hex elements but they will be not orthogonal.

And my second question: what flow directions support tri-prism elements? Can I use these elements as shown on picture?

Thank you!

Attached Images
File Type: jpg prism.jpg (7.4 KB, 7 views)
rv82 is offline   Reply With Quote

Old   April 8, 2013, 09:45
Senior Member
John Chawner
Join Date: Mar 2009
Location: Fort Worth, Texas, USA
Posts: 260
Rep Power: 11
jchawner is on a distinguished road
The general rule of thumb is that hex cells are superior to tet cells for CFD, especially in high gradient regions like boundary layers and wakes. The exceptions are that the hex cells must be of decent quality (e.g. low skew). Another exception is that a hybrid mesh with prisms in the boundary layer and tets elsewhere can support accurate CFD. You can find many examples of good CFD meshes in any of the reports from the AIAA's Drag Prediction Workshop.
John Chawner / /
on Twitter: @jchawner
jchawner is offline   Reply With Quote

Old   April 12, 2013, 09:44
Senior Member
ztdep's Avatar
p ding
Join Date: Mar 2009
Posts: 337
Rep Power: 11
ztdep is on a distinguished road
Send a message via Yahoo to ztdep Send a message via Skype™ to ztdep
we care the mesh quality. you can use any cell type. Tet, Hex, Prism, wedge, etc.
orthogonal mesh will increase the accuracy, and is more easy to solve.
ztdep 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
second order schemes marine OpenFOAM 66 October 26, 2014 12:10
interFoam/kOmegaSST tank filling with printStackError/Mules simpomann OpenFOAM Running, Solving & CFD 3 February 17, 2014 18:06
Layers:problem with curvature giulio.topazio OpenFOAM Native Meshers: snappyHexMesh and Others 10 August 22, 2012 09:03
killed "snappyHexMesh" parkh32 OpenFOAM Pre-Processing 2 April 8, 2012 17:12
snappyHexMesh aborting Tobi OpenFOAM Native Meshers: snappyHexMesh and Others 0 November 10, 2010 04:23

All times are GMT -4. The time now is 04:35.