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

Using the localBlended scheme for DES

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

Reply
 
LinkBack Thread Tools Display Modes
Old   November 18, 2009, 13:35
Default Using the localBlended scheme for DES
  #1
Member
 
Philippe B. Vincent
Join Date: Mar 2009
Location: Quebec, Canada
Posts: 32
Rep Power: 8
philippebv is on a distinguished road
Good afternoon foamers,

I have a question on the use of the localBlended scheme. The goal is to use a different scheme for the RANS zone and LES zone. I calculate UBlendingFactor in my turbulence model and it returns a surfaceScalarField as it is needed by the localBlended scheme such as

UBlendingFactor = 1 in the LES region
UBlendingFactor = 0 in the RANS region

So far this works fine. Now, my question is pretty simple: How does UBlendingFactor acts when calling the scheme? If I write, in the fvScheme file of my case, something like:

div(phi,U) Gauss localBlended upwind linear;

Where is it going to be upwind and where is it going to be linear?

Thank you for any help,

Philippe
philippebv is offline   Reply With Quote

Old   November 18, 2009, 14:38
Default
  #2
Member
 
Philippe B. Vincent
Join Date: Mar 2009
Location: Quebec, Canada
Posts: 32
Rep Power: 8
philippebv is on a distinguished road
Hi again,

after looking at localBlended.H :

blendingFactor*tScheme1_().interpolate(vf)
+ (scalar(1) - blendingFactor)*tScheme2_().interpolate(vf);

It seems that tScheme1 will be effective where blendingFactor=1. So if I want to have a linear scheme for the LES region, I would write :

div(phi,U) Gauss localBlended linear upwind;

Am I right?
philippebv 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
Implementation of QUICK scheme Romuald Skoda Main CFD Forum 10 August 3, 2010 12:23
AUSM scheme ? Central Scheme boling Main CFD Forum 5 September 9, 2009 19:06
Definition of limiter function for central dirrerencing scheme sebastian_vogl OpenFOAM Running, Solving & CFD 0 January 5, 2009 12:08
Best Meshing scheme for Cylinder Nutrex Main CFD Forum 4 July 29, 2008 11:03
extrapolation in MUSCL scheme Chandra Main CFD Forum 6 February 14, 2007 12:21


All times are GMT -4. The time now is 13:12.