|June 25, 2012, 04:19||
Why define a grad Scheme when using linearUpwind?
Join Date: Apr 2012
Posts: 7Rep Power: 6
I have two question regarding the div Schemes. I set my div-Schemes like this:
div(phi,U) Gauss linearUpwind grad(U)
Could you tell me why I have to define a grad Scheme when using linear Upwind as a div Scheme? I don't see the diference between linearUpwind and upwind/QUICK which would explain the need for a gradient Scheme.
I tried these:
div(phi,U) Gauss upwind
div(phi,U) Gauss upwind grad(U)
Why can I define a grad Scheme after defining a div Scheme, what does it change?
Thanks for your help in advance.
|June 25, 2012, 08:54||
Join Date: Mar 2009
Posts: 103Rep Power: 9
the thread below might help you to understand why you need to specify a grad scheme when using linearUpwind and what the difference is between linearUpwind and upwind.
|divergent scheme, gradient scheme, linear upwind|
|Thread||Thread Starter||Forum||Replies||Last Post|
|2nd order upwind scheme (Fluent and CFX)||Far||FLUENT||0||May 22, 2011 01:50|
|Volume Scheme: upwind and linearUpwind||sfhr||OpenFOAM Pre-Processing||1||December 20, 2010 16:58|
|how to understand high resolution scheme and high order scheme||iilw1314||Main CFD Forum||3||September 30, 2010 10:43|
|Implementation of QUICK scheme||Romuald Skoda||Main CFD Forum||10||August 3, 2010 12:23|
|Missing math.h header||Travis||FLUENT||4||January 15, 2009 12:48|