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

Problemas with Quick

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   May 11, 2010, 13:42
Default Problemas with Quick
  #1
Senior Member
 
Antonio Martins
Join Date: Mar 2009
Location: Porto, Porto, Portugal
Posts: 112
Rep Power: 17
titio is on a distinguished road
Send a message via MSN to titio Send a message via Skype™ to titio
Hi foamers,

I am having problems with QUICK to simulate the flow in a T-Mixer geometry, with two inlets and two outlets, for a complex fluid where the normal stresses have to be taken into account.

I manage to do the simulations with gamma, upwind, minmod and SFCD, but when I use Quick, I does not work. In particular the simulation blows. Looks like I am using an unbounded Quick method.

How can I use a bounded Quick method? I am testing several methods to see which one is better.

Regards,

António Martins
titio is offline   Reply With Quote

Old   May 11, 2010, 18:21
Default
  #2
Senior Member
 
santos's Avatar
 
Jose Luis Santos
Join Date: Mar 2009
Location: Portugal
Posts: 215
Rep Power: 18
santos is on a distinguished road
Send a message via Skype™ to santos
According to the User Guide, the OpenFOAM implementation of QUICK is supposed to be bounded. Like you, I have had problems with this scheme where my unsteady flow simulations diverged randomly. limitedLinearV behaved much better.

Regards,
José Santos
santos is offline   Reply With Quote

Old   May 12, 2010, 01:14
Default
  #3
Senior Member
 
Alberto Passalacqua
Join Date: Mar 2009
Location: Ames, Iowa, United States
Posts: 1,912
Rep Power: 36
alberto will become famous soon enoughalberto will become famous soon enough
QUICK might lead to instabilities due to structure of the interpolation formula (signs of the terms).

I would let QUICK go since it has no advantage on unstructured grids (It is at best second order, and being upwinded, it is quite dissipative).

You might want to give a try to linearUpwind (and linearUpwindV),

maybe with the cellLimited option:

div(phi,U) Gauss linearUpwindV cellLimited Gauss linear 1;

IMHO, it usually gives pretty good results in many practical applications.

Best,
__________________
Alberto Passalacqua

GeekoCFD - A free distribution based on openSUSE 64 bit with CFD tools, including OpenFOAM. Available as in both physical and virtual formats (current status: http://albertopassalacqua.com/?p=1541)
OpenQBMM - An open-source implementation of quadrature-based moment methods.

To obtain more accurate answers, please specify the version of OpenFOAM you are using.
alberto is offline   Reply With Quote

Old   May 12, 2010, 04:14
Default
  #4
Senior Member
 
maddalena's Avatar
 
maddalena
Join Date: Mar 2009
Posts: 436
Rep Power: 23
maddalena will become famous soon enough
Hello Alberto, Hello Josč Santos,
I am looking for some good references on numerical schemes for CFD application. Somewhat that help me to understand what the influence of the different schemes is on the solution, and what is best for specific applications. Any suggestions? Thank you,
maddalena
maddalena is offline   Reply With Quote

Old   May 12, 2010, 07:09
Default
  #5
Senior Member
 
santos's Avatar
 
Jose Luis Santos
Join Date: Mar 2009
Location: Portugal
Posts: 215
Rep Power: 18
santos is on a distinguished road
Send a message via Skype™ to santos
Dear Maddalena,

I would suggest a good CFD book, being my personal option: "Computational Methods for Fluid Dynamics" by Ferziger and Peric.

Regards,
Jose Santos
santos 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
Implementation of QUICK scheme Romuald Skoda Main CFD Forum 11 November 6, 2017 22:20
QUICK Scheme mmahdinia OpenFOAM Running, Solving & CFD 3 December 9, 2009 17:30
Simulation diverges randomly QUICK santos OpenFOAM Running, Solving & CFD 4 August 18, 2006 18:39
ENO, TVD, QUICK... I was wondering... Main CFD Forum 1 August 21, 2003 10:45
QUICK scheme kim FLUENT 1 August 29, 2002 11:16


All times are GMT -4. The time now is 17:33.