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

Coodles vs sonicTurbFoam

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

Reply
 
LinkBack Thread Tools Display Modes
Old   April 26, 2005, 09:17
Default Dear OpenFOAM experts, Can
  #1
Senior Member
 
Pei-Ying Hsieh
Join Date: Mar 2009
Posts: 317
Rep Power: 9
hsieh is on a distinguished road
Dear OpenFOAM experts,

Can anyone here explain the differences between coodles and sonicTurbFoam?

Is there such thing as "steady state compressible (Mach .5 - 0.9) turbulent flow"? Thanks!

Pei
hsieh is offline   Reply With Quote

Old   April 26, 2005, 09:25
Default sonicTurbFoam: Transient RANS
  #2
Senior Member
 
Eugene de Villiers
Join Date: Mar 2009
Posts: 725
Rep Power: 12
eugene is on a distinguished road
sonicTurbFoam:
Transient RANS solver for trans-sonic/supersonic, turbulent flow of a compressible gas.

coodles:
LES solver for sub/trans-sonic turbulent flow of a compressible gas.
eugene is offline   Reply With Quote

Old   April 26, 2005, 10:13
Default Thanks Eugene! When using o
  #3
Senior Member
 
Pei-Ying Hsieh
Join Date: Mar 2009
Posts: 317
Rep Power: 9
hsieh is on a distinguished road
Thanks Eugene!

When using oneEqEddy in LES, k is needed in /0/k. How is this k calculated for the inlet?

Pei
hsieh is offline   Reply With Quote

Old   April 26, 2005, 10:18
Default What kind of inlet are we talk
  #4
Senior Member
 
Eugene de Villiers
Join Date: Mar 2009
Posts: 725
Rep Power: 12
eugene is on a distinguished road
What kind of inlet are we talking about, i.e. fully/partially developed, laminar or slugflow?
eugene is offline   Reply With Quote

Old   April 26, 2005, 10:51
Default Hi, Eugene, Last time I did
  #5
Senior Member
 
Pei-Ying Hsieh
Join Date: Mar 2009
Posts: 317
Rep Power: 9
hsieh is on a distinguished road
Hi, Eugene,

Last time I did turbulence was 15 years ago. So, I am learning.

Inlet will be fully developed turbulent.

Is it LES generally more computational expensive than RANS? Especially, I have a complex geometry, so, may be I should stick to RANS kEpsilon model (I do not really want to resolve small flow structures)? Can you advise which solver will be appropriate for sub-sonic/transonic with kEpsilon model?

Thanks again for your help!

Pei
hsieh is offline   Reply With Quote

Old   April 26, 2005, 11:02
Default Ho! You definitely dont want t
  #6
Senior Member
 
Eugene de Villiers
Join Date: Mar 2009
Posts: 725
Rep Power: 12
eugene is on a distinguished road
Ho! You definitely dont want to be doing LES unless you have to. It is VERY expensive.

Try rhoTurbFoam for a compressible RANS solver, although I dont know how it will cope with trans-sonic flows. There is also sonicTurbFoam, but again this is not my area of expertise. Maybe someone who is more knowledgeable than me can give you some pointers on what the different RANS compressible codes do?
eugene is offline   Reply With Quote

Old   April 26, 2005, 13:14
Default >Is there such thing as "stead
  #7
Senior Member
 
Join Date: Mar 2009
Posts: 854
Rep Power: 13
henry is on a distinguished road
>Is there such thing as "steady state compressible (Mach .5 - 0.9) turbulent flow"? Thanks!

rhoSimpleFoam
henry is offline   Reply With Quote

Old   April 26, 2005, 16:16
Default Thanks Henry! What rhoTurbF
  #8
Senior Member
 
Pei-Ying Hsieh
Join Date: Mar 2009
Posts: 317
Rep Power: 9
hsieh is on a distinguished road
Thanks Henry!

What rhoTurbFoam is for? Is it suitable for mach .5?

Pei
hsieh is offline   Reply With Quote

Old   April 26, 2005, 17:02
Default rhoTurbFoam is for transient c
  #9
Senior Member
 
Join Date: Mar 2009
Posts: 854
Rep Power: 13
henry is on a distinguished road
rhoTurbFoam is for transient compressible low-Ma laminar and turbulent flow and rhoSimpleFoam is for steady-state compressible low-Ma laminar and turbulent flow.
henry is offline   Reply With Quote

Old   February 3, 2009, 07:13
Default Hi fomers, I am running a
  #10
Member
 
Vishal Jambhekar
Join Date: Mar 2009
Location: University Stuttgart, Stuttgart Germany
Posts: 90
Blog Entries: 1
Rep Power: 8
vishal is on a distinguished road
Hi fomers,

I am running a case with sonicTurbFoam with 3 mach velocity at inlet. whare as inlet static temprature is 110 K and pressure is 0.15 bar.
I want to mainly capture the shock boundry layer interaction at inlet for air breathing engine.

Can you please tell me what outlet conditions should i apply. any other openions regarding any tool to plot static pressure along surface is also welcome. Plase help me in this issue.

Thanks
__________________
Cheers,

Vishal Jambhekar...
"Simulate the way ahead......!!!"
vishal is offline   Reply With Quote

Old   February 3, 2009, 07:17
Default Hi, One more thing is curre
  #11
Member
 
Vishal Jambhekar
Join Date: Mar 2009
Location: University Stuttgart, Stuttgart Germany
Posts: 90
Blog Entries: 1
Rep Power: 8
vishal is on a distinguished road
Hi,

One more thing is currently i am using RNG K-Epsilon method. WHich scheme is best suite for capturing physics.

Thanks ij advance.

VIshal.
__________________
Cheers,

Vishal Jambhekar...
"Simulate the way ahead......!!!"
vishal 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
Coodles anja OpenFOAM Pre-Processing 33 January 14, 2010 10:05
Pressure waves bouncing around while using coodles ankgupta8um OpenFOAM Running, Solving & CFD 4 March 5, 2008 07:54
Pow in lib64tlslibmso6 SigFpe when running coodles with SpalartAllmaras lillberg OpenFOAM Bugs 4 December 7, 2007 09:17
Question about coodles tangd OpenFOAM Running, Solving & CFD 0 June 20, 2006 03:58
Startingsetting coodles on an academic case melanie OpenFOAM Running, Solving & CFD 5 March 30, 2006 04:00


All times are GMT -4. The time now is 11:05.