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

Two equation turbulence models solver settings

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 5, 2011, 21:49
Default Two equation turbulence models solver settings
  #1
Senior Member
 
truffaldino's Avatar
 
Join Date: Jan 2011
Posts: 233
Blog Entries: 5
Rep Power: 8
truffaldino is on a distinguished road
Hello,

I will be grateful for your help. I am trying to make to converge solution for a low Re flow past to 2D airfoil with Realizable KE (wall enchanced treatment) and KW/KW SST transitional models as well.

There is no problem with convergence for one equation SA model and results are more or less satisfactory, but once I switch to 2 equation models I am going in a trouble.

I have checked y+, it is within the limits .1 to 1.

So, there could be two reasons for failure

1) These models are not suitable for analysing airfoils at Re about 10^5

2) My solver setting are wrong

Could the second be the case?

I will be grateful if you could help me:

Here I list the solver settings

__________________________________________________ _______

Steady

Pressure Based Implicit Formulation

Absolute velocity formulation

Green-Gauss Cell Based Gradient option

*************

Pressure_Velocity coupling SIMPLE

Discretization

Pressure PRESTO!

Momentum SECOND ORDER UPWIND

Turbulent kinetik energy SECOND ORDER UPWIND

Specific dissipation rate SECOND ORDER UPWIND
++++++++++++++++

Underrelaxation factors:

pressure .3

density 1

body force 1

momentum .7

I will be grateful for your help

Truffaldino
truffaldino 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
the differences between turbulence models agungwp FLUENT 3 April 19, 2010 17:04
k-e turbulence model and energy equation Blob Main CFD Forum 0 May 29, 2009 08:35
Coupled solver energy equation problem lucioantonio FLUENT 0 April 3, 2009 10:21
Why Turbulence models are not universal. Senthil Main CFD Forum 4 July 5, 2000 04:34
Turbulence models Reza Imani Main CFD Forum 6 November 16, 1999 11:37


All times are GMT -4. The time now is 03:52.