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

Diffusion term in the conservative equation

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

Reply
 
LinkBack Thread Tools Display Modes
Old   November 30, 2005, 05:52
Default Hi all I am wondering how I
  #1
New Member
 
Max
Join Date: Mar 2009
Posts: 24
Rep Power: 7
didomenico is on a distinguished road
Hi all
I am wondering how I can insert the diffusion term in the convervative form of NS equations (i.e. rhoU, rhoE) in compressible solvers (like rhoSonicFoam).
If I use a term like

fvc:laplancian(mu, U)+1/3*div()

such an explicit treatment would require very small timesteps.
Another possibility is to express the diffusions in terms of rhoU, but in this case a huge number of additional terms appear (both implicit and explicit).
I am sure there is a very simple way to do this with OpenFoam, but the documentation is huge and a starting tip would be great
Thanks
Massimiliano
didomenico is offline   Reply With Quote

Reply

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
UDS Diffusion Term Johannes FLUENT 0 April 4, 2007 05:32
conservative/non-conservative forms of NS equation Ishaq Main CFD Forum 0 June 20, 2006 01:47
Discretization of the Diffusion Term Rui CFX 0 October 24, 2005 12:43
secondary diffusion term Steve Moore FLUENT 9 September 7, 2005 23:14
Source term for diffusion equation in FLUENT 4.5 Raja Banerjee FLUENT 1 August 30, 2000 23:00


All times are GMT -4. The time now is 19:03.