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

Boundary Conditions and solver for low Mach laminar air jet

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

Reply
 
LinkBack Thread Tools Display Modes
Old   September 12, 2006, 18:11
Default Hi all, I'd like to run a l
  #1
New Member
 
Fabrizio Bisetti
Join Date: Mar 2009
Posts: 3
Rep Power: 8
fbisetti is on a distinguished road
Hi all,

I'd like to run a laminar, low mach (Mach ~0.01) air jet issuing in ambient air (p=1 atm). I'm quite lost as far as the specification of the following:

- solver: an incompressible calculation should do the job.
Should I stick with the basic fvSolution and fvScheme files from the cavity example (tutorials/icoFoam/cavity)?

- bcs: the mesh I produced (imported from Fluent) has 3 boundary patches:

a) jet exit plane
b) jet tube outer walls (the jet tube enters the domain to allow for entrainment from below)
c) all the other surfaces

Physically, I'd like to specify a uniform velocity on the exit plane (patch a), zero velocity at the jet tube walls (patch b),
and allow for entrainment or outflow in the remaining patch (patch c).

My question: what are the specifics for patch c) in the files polyMesh/boundary, 0/U and 0/p?

After reading the UserGuide, I'm still extremely confused about the coherency of the specifications on patch c in those 3 separate files,
and the difference between base, primitive, derived and physical types for patch attributes.


Thanks a lot for any help!
Fabrizio
fbisetti is offline   Reply With Quote

Old   September 13, 2006, 12:49
Default Hello You can have a look a
  #2
Member
 
Pierre Le Fur
Join Date: Mar 2009
Location: UK
Posts: 60
Rep Power: 8
pierre is on a distinguished road
Hello

You can have a look at the tuturial for lesInterFoam (nozzleFlow) for help on the boundary conditions.
Is it a round or planar jet?

Pierre
pierre 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
mach number and selection of the fluent solver turbinesv FLUENT 4 April 24, 2011 00:14
mach number and CFX 11.0 solver turbinesv CFX 5 January 5, 2009 06:43
Solver is finishing with huge Mach number Fonzie CFX 1 March 12, 2007 15:15
High Mach number solver Oliver Gloth (Gloth) OpenFOAM Running, Solving & CFD 0 December 20, 2004 08:30
Solver for Low-Re medium Mach flow Frederik CD-adapco 0 July 12, 2004 05:23


All times are GMT -4. The time now is 13:45.