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

What is Gauss linear upwind?

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

Reply
 
LinkBack Thread Tools Display Modes
Old   June 19, 2012, 04:36
Default What is Gauss linear upwind?
  #1
New Member
 
Join Date: Oct 2011
Posts: 19
Rep Power: 5
okroud is on a distinguished road
Hi,

i have a question concerning an existing case i didn't create by myself, but I have to use it. There's a divScheme i don't understand:

div((nuEff*def(grad(U).T()))) Gauss linear upwind;

I know linear is second order interpolation.
I know upwind is first order interpolation.

But I don't know how this one behaves and which on the argument of the other one is.
Could someone tell me something like
Gauus <interpolationScheme> <...>?
Gauss <...> <interpolationScheme>?

Thanks for your help, okroud
okroud is offline   Reply With Quote

Old   June 20, 2012, 18:38
Default
  #2
Senior Member
 
kmooney's Avatar
 
Kyle Mooney
Join Date: Jul 2009
Location: Amherst, MA USA - San Diego, CA USA
Posts: 285
Rep Power: 9
kmooney is on a distinguished road
You could check out the source code for it here:

Code:
/src/finiteVolume/lnInclude/linearUpwind.C
I'm not too familiar with its functionality. The code describes it as upwind with an explicit linear correction.
kmooney is offline   Reply With Quote

Old   June 20, 2012, 18:52
Default
  #3
New Member
 
Join Date: Oct 2011
Posts: 19
Rep Power: 5
okroud is on a distinguished road
Thanks. So you think that linear upwind is the same as linearUpwind and therefore a second Order Scheme?
okroud is offline   Reply With Quote

Old   June 20, 2012, 18:55
Default
  #4
Senior Member
 
kmooney's Avatar
 
Kyle Mooney
Join Date: Jul 2009
Location: Amherst, MA USA - San Diego, CA USA
Posts: 285
Rep Power: 9
kmooney is on a distinguished road
I'm not completely sure. I've actually never seen anything with that particular syntax. I've seen
Code:
Gauss linear
and
Code:
Gauss linearUpwind phi
but never the way you've written it.
kmooney is offline   Reply With Quote

Old   July 2, 2012, 10:04
Default
  #5
New Member
 
Join Date: Oct 2011
Posts: 19
Rep Power: 5
okroud is on a distinguished road
Quote:
Originally Posted by kmooney View Post
You could check out the source code for it here:

Code:
/src/finiteVolume/lnInclude/linearUpwind.C
I'm not too familiar with its functionality. The code describes it as upwind with an explicit linear correction.
I looked at the file linearUpwind.C, but i have some Problems interpreting it. I see that it's upwind, but where do you see it has an explicit linear correction?

I'd realy like to understand the mathematical background of some of the schemes by watching the sourcecode, is there any source or work where the schemes are mathematically further explained?
okroud is offline   Reply With Quote

Reply

Tags
divscheme, first order, linear upwind, second order

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
Free Surface Ship Flow timfranke OpenFOAM Running, Solving & CFD 305 July 24, 2015 03:10
Problem in fvschemes divSchemes cannot use Gauss linearUpwind nico765 OpenFOAM Bugs 27 June 3, 2014 05:29
please help me which solver is better for my application Ger_US OpenFOAM 8 January 8, 2013 13:29
solution diverges when linear upwind interpolation scheme is used subash OpenFOAM 0 May 29, 2010 01:23
Water pump OpenFOAM 15 ANSYS CFX 110 comparation waynezw0618 OpenFOAM Running, Solving & CFD 39 March 5, 2009 13:57


All times are GMT -4. The time now is 12:43.