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

Definition of limiter function for central dirrerencing scheme

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   January 5, 2009, 12:08
Default Hello everybody, as you pro
  #1
Member
 
Sebastian Vogl
Join Date: Mar 2009
Location: Munich, Germany
Posts: 62
Rep Power: 17
sebastian_vogl is on a distinguished road
Hello everybody,

as you probably know, for the discretization of the convective parts in the differential equations in OpenFoam the central differencing scheme is one of the schemes offered to use. As this scheme tends to oscillations there is a limiter function which avoids or at least reduces the oscillations. The User Guide says, setting this limiter function to one means best TVD conformance and setting it to zero gives best accuracy (which seems to be the normal central differencing scheme for this case) and recommends using the value one.
However the User Guide doesn't say how this limiter Function is defined or how the central differencing scheme together with the limiter function is written.
As I know this function from literature it returns an Upwind scheme when set to zero and an ordinary central differencing scheme when set to one.
As it seems the definition of the limiter function in OpenFoam and the definition I know don't fit together.

Could anyone of you please tell me, how this limiter function for the central differencing scheme is defined in OpendFoam and how the central differencing scheme together with this limiter function reads?

Thank you very much for your effort and best regards,
Sebastian Vogl
sebastian_vogl is offline   Reply With Quote

Reply

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
AUSM scheme ? Central Scheme boling Main CFD Forum 7 January 7, 2016 03:41
Upwing vs Central scheme Ruben Main CFD Forum 15 August 8, 2005 07:13
Central Differencing Scheme in Fluent alice FLUENT 2 March 21, 2004 08:30
Central differencing scheme alice FLUENT 1 March 11, 2004 20:07
limiter & entropy fix of Roe scheme kei-tee Main CFD Forum 21 May 26, 2003 06:50


All times are GMT -4. The time now is 22:07.