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

Which solver do you recommand

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

Reply
 
LinkBack Thread Tools Display Modes
Old   October 8, 2008, 08:01
Default Dear users, I am a new user
  #1
Senior Member
 
stephane sanchi
Join Date: Mar 2009
Posts: 300
Rep Power: 9
openfoam_user is on a distinguished road
Dear users,

I am a new user but have already done a few tutorials and a simple 3D case (flow around a sphere).

Which solver do you recommend for external aerodynamics around :
-cars (Euler and Navier-Stokes)
-aircrafts in subsonic regime (Euler and Navier-Stokes)
-aircrafts in supersonic regime (Euler and Navier-Stokes)

All comments are welcome !

Regards,

Stephane
openfoam_user is offline   Reply With Quote

Old   October 8, 2008, 08:40
Default I'd recommend RANS for them al
  #2
Senior Member
 
Anonymous
Join Date: Mar 2009
Posts: 110
Rep Power: 8
madad2005 is on a distinguished road
I'd recommend RANS for them all, but you could get away with Euler for supersonic flow as angles of attack are generally quite low. Best turbulence model for aerospace applications is SA, but the Mentor SST model is probably the most capable overall for all the models. IMO!
madad2005 is offline   Reply With Quote

Old   October 8, 2008, 10:12
Default Ciao Adriano, could tell me
  #3
Senior Member
 
stephane sanchi
Join Date: Mar 2009
Posts: 300
Rep Power: 9
openfoam_user is on a distinguished road
Ciao Adriano,

could tell me the name of the OpenFOAM solvers ?

Regards,

Stephane.
openfoam_user is offline   Reply With Quote

Old   October 8, 2008, 12:29
Default Hi Stephane, I think rhoCen
  #4
Senior Member
 
Anonymous
Join Date: Mar 2009
Posts: 110
Rep Power: 8
madad2005 is on a distinguished road
Hi Stephane,

I think rhoCentralFoam is your best option for most of those cases. However, there is always the option of using an incompressible solver if you are around the M = 0.3 mark or below.

What are you working on? Is it a University-based project?

Regards,

Adriano
madad2005 is offline   Reply With Quote

Old   October 9, 2008, 02:27
Default Hi Adriano, It is not a Uni
  #5
Senior Member
 
stephane sanchi
Join Date: Mar 2009
Posts: 300
Rep Power: 9
openfoam_user is on a distinguished road
Hi Adriano,

It is not a University-based project. I just want to learn using OpenFOAM.

I have to learn it step by step :
- importing grids done with ICEMCFD Hexa
- choosing the right flow solver (because there is a lot of solvers inside OpenFOAM) !!!
- doing external aerodynamics (cars and aircrafts)
- doing post-processing (plotting residuals, forces, coefficients, ...)
- doing hydrodynamics calculations (marine propellers and ships)

Adriano, for how long are you using OpenFOAM ?

Look at the website of my company !

www.cfse.ch

Stephane.
openfoam_user is offline   Reply With Quote

Old   October 9, 2008, 03:24
Default Hi Stephane, Not much longe
  #6
Senior Member
 
Anonymous
Join Date: Mar 2009
Posts: 110
Rep Power: 8
madad2005 is on a distinguished road
Hi Stephane,

Not much longer than you! :-) I also find the numerous solvers and different dict files confusing at times. I have plenty of experience using Hexa, though. The best way, I think, is to write out a fluent .msh file, or a STAR-CD .ccm file, and use one of the supplied converters to foam.

External aerodynamics of cars using hexa is going to be a tough task. How do you plan to mesh inside the wheel? Nonetheless, you should really use a compressible, turbulent flow solver for the aircraft work, and an incompressible flow solver for the vehicle work (excluding the airbox).

For post-processing, my personal opinion is parafoam is very difficult to use and has a steep learning curve. I'd recommend a trial license of Tecplot, which I've found to be the most pleasing of the big three.

I use OpenFOAM more as a diversion than for serious research. I'd hope someone else here who uses it on a more regular basis can offer you more expert assistance than myself.

Regards,

Adriano
madad2005 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
segregated solver vrs coupled solver sm FLUENT 0 November 6, 2007 02:24
about CFX solver student CFX 3 April 6, 2006 19:02
How to do it if i change the seregated finitevolume solver to segregated finiteelement solver dandes OpenFOAM Pre-Processing 0 March 22, 2006 22:06
solver fuf FLUENT 0 June 19, 2003 13:54
coupled solver / uncoupled solver Jaan Unger Main CFD Forum 0 September 3, 2002 08:30


All times are GMT -4. The time now is 23:30.