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

Question about matching of solver and turbulence model

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   January 31, 2017, 06:28
Default Question about matching of solver and turbulence model
  #1
New Member
 
TSE Kwan Shu
Join Date: Sep 2016
Posts: 10
Rep Power: 10
louistse is on a distinguished road
Hello everyone, I have a question about the solver and turbulence model. Are there any criteria that a certain solver is specially designed for a particular turbulence model.

The problem rises when I read through the user guide: http://cfd.direct/openfoam/user-guid...x13-940003.5.2

For instance, icoFoam is a
Quote:
Transient solver for incompressible, laminar flow of Newtonian fluids.
But what if the problem itself is not turbulent? In other words, if I use icoFoam to solve the flow around a circular cylinder with Re=1000, should I abandon the results obtained even if the job can be implemented?


In addition, pisoFoam is a
Quote:
Transient solver for incompressible, turbulent flow, using the PISO algorithm.
While simpleFoam is a
Quote:
Steady-state solver for incompressible, turbulent flow, using the SIMPLE algorithm.
Is that true where pisoFoam has to be used with LES turbulence model in order to obtain transient solution? And the solution is not transient if RAS turbulence model is used?
In contrast, is that true where simpleFoam has to be used with RAS turbulence model in order to obtain steady-state solution?
louistse is offline   Reply With Quote

Old   February 1, 2017, 22:36
Default
  #2
Senior Member
 
khedar
Join Date: Oct 2016
Posts: 111
Rep Power: 10
khedar is on a distinguished road
Best way to find out is by looking at the UEqn.H File in the solver source code. If it contains the term "turbulence->divREff", then turbulence Models can be used including laminar.

Sent from my MotoG3 using CFD Online Forum mobile app
khedar is offline   Reply With Quote

Reply


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
Model the turbulence and solver BakedAlmonds OpenFOAM Programming & Development 0 June 16, 2016 17:49
Wrong flow in ratating domain problem Sanyo CFX 17 August 15, 2015 07:20
Read a new variable from a solver to turbulence model Clarkyan OpenFOAM Programming & Development 4 June 4, 2015 12:20
Overflow Error in Multiphase Modelling with Two Continuous Fluids ashtonJ CFX 6 August 11, 2014 15:32
An error has occurred in cfx5solve: volo87 CFX 5 June 14, 2013 18:44


All times are GMT -4. The time now is 13:54.