CFD Online Logo CFD Online URL
Home > Forums > ANSYS Meshing & Geometry

errors from meshing

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

LinkBack Thread Tools Display Modes
Old   November 11, 2009, 08:47
Default errors from meshing
Senior Member
Join Date: Nov 2009
Posts: 158
Rep Power: 10
thecfduser is on a distinguished road
Hello everybody,
i am a user of Fluent and Gambit.
I would like to know what types of errors are due to the meshing

1-why is it always advised to keep the size ratio of 2 consecutive cells around 1.2 ???
2- why a highly skewed cell will affect the simulation???

I dont understand those 2 points, since as the finite volume method is conservative, i dont see how the grid quality would affect results (a coarser grid will induce a higher truncation error, but why about cells shape?)

thecfduser is offline   Reply With Quote

Old   November 12, 2009, 16:07
Join Date: Oct 2009
Location: Italy
Posts: 88
Rep Power: 10
bob12 is on a distinguished road
I hope to clarify the second point: the importance of the shape of the mesh quality is that trasmit an information through it.
for example if the face of a cube transmit this information to another one is perfect, but if it sends it to a curve then it creates a spazial dispersion of information.
bob12 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
How to write k and epsilon before the abnormal end xiuying OpenFOAM Running, Solving & CFD 8 August 27, 2013 15:33
Convergence moving mesh lr103476 OpenFOAM Running, Solving & CFD 30 November 19, 2007 15:09
Transient simulation not converging skabilan OpenFOAM Running, Solving & CFD 12 September 17, 2007 17:48
IcoFoam parallel woes msrinath80 OpenFOAM Running, Solving & CFD 9 July 22, 2007 02:58
Could anybody help me see this error and give help liugx212 OpenFOAM Running, Solving & CFD 3 January 4, 2006 19:07

All times are GMT -4. The time now is 15:31.