CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

Numerical error at false diffusion case

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   January 28, 2015, 07:18
Exclamation Numerical error at false diffusion case
  #1
New Member
 
JPeternel
Join Date: Oct 2014
Posts: 19
Rep Power: 12
jpeter3 is on a distinguished road
Hi!

I set up this case to check how openfoam deals with false diffusion.

However, there appeared a strange thing: in upper right corner there are some serious
temperature fluctuations on the area 6x6 cells, independent of the mesh refinement level.

The flow has direction of (1,1,0) and domain is 2D.

Has anybody an idea why this happens?

Photos:
https://onedrive.live.com/embed?cid=...A6FoODEJOpoeZc

Chears,
Jaka
jpeter3 is offline   Reply With Quote

Reply

Tags
false diffusion, numerical error, upper right corner


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
[DesignModeler] DesignModeler Scripting: How to get Full Command Access ANT ANSYS Meshing & Geometry 53 February 16, 2020 16:13
False Diffusion?? patovalades Main CFD Forum 3 July 20, 2014 14:16
numerical diffusion in tetrahedral grids Lilly Main CFD Forum 8 May 31, 2011 11:08
Free surface boudary conditions with SOLA-VOF Fan Main CFD Forum 10 September 9, 2006 13:24
numerical diffusion in 1D Jon Main CFD Forum 2 July 31, 2005 23:58


All times are GMT -4. The time now is 16:25.