CFD Online Logo CFD Online URL
Home > Forums > General Forums > Main CFD Forum

Advice on turbulence model for complex internal flow

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

LinkBack Thread Tools Search this Thread Display Modes
Old   September 2, 2011, 16:42
Default Advice on turbulence model for complex internal flow
New Member
Join Date: Aug 2010
Posts: 11
Rep Power: 15
JPBodner is on a distinguished road
Hi all

I am working on a model of an internal flow with a low Re (~1400), but there are some geometric features where local turbulence could be created. This includes some twists and turns as well as an internal jet (or large-expansion). I am simulating water flow through the passages of a small device My main interest is predicting pressure drops through the system.

I presume that it's best to solve with turbulence even though the Re is below 2000, because there are some regions of swirling-like behavior. (If you disagree and would just go laminar, let me know) But I am not sure what type of turbulence model is best for this type of flow. Low-Re k-e? k-w?

Any suggestions given the information I've provided?

Thanks in advance.
JPBodner is offline   Reply With Quote

Old   September 3, 2011, 03:07
Senior Member
Join Date: May 2009
Posts: 276
Rep Power: 18
andy_ is on a distinguished road
Traditional turbulence models generally assume a high Reynolds number turbulent flow in their formulation which you do not have. The low Reynolds number versions of high Reynolds turbulence models tend to be more of a curve fitting exercises rather than introducing more physics based terms into the equations. They are normally an improvement for the types of flows they have been setup to address but not for general cases and transition.

For accuracy you should run an unsteady 3D laminar solution and resolve what is causing the possible transition to turbulence. Do you have the computing resources to do this?

Last edited by andy_; September 3, 2011 at 03:08. Reason: Missed word
andy_ is offline   Reply With Quote


low reynolds, model, turbulence

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
Turbulence model for low Reynolds number flow? Nokadu Main CFD Forum 3 May 26, 2013 11:42
Wrong calculation of nut in the kOmegaSST turbulence model FelixL OpenFOAM Bugs 27 March 27, 2012 09:02
Combustion Chamber flow - turbulence model folek FLUENT 0 April 13, 2010 15:58
Discussion: Reason of Turbulence!! Wen Long Main CFD Forum 3 May 15, 2009 09:52
Natural convection - Inlet boundary condition max91 CFX 1 July 29, 2008 20:28

All times are GMT -4. The time now is 03:45.