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

Periodic pressure B.C. on collocated SMAC code

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

LinkBack Thread Tools Search this Thread Display Modes
Old   August 18, 2010, 23:03
Default Periodic pressure B.C. on collocated SMAC code
Join Date: Nov 2009
Posts: 65
Rep Power: 15
waku2005 is on a distinguished road
Hi all,

I'd like to know how to set peridoic pressure B.C. on collocated SMAC FVM.

Currently, I'm writing LES code in a square duct using SMAC method on hexahedral meshs.

For the stream direction (x direction), I hope to set periodic boundary conditions, and I was just thinking to set at the cell faces of both inlet and exit cells like below:
uf_inlet = uf_exit = 0.5*(u_inlet + u_exit),
vf_inlet = vf_exit = 0.5*(v_inlet + v_exit),
wf_inlet = wf_exit = 0.5*(w_inlet + w_exit),
Tf_inlet = Tf_exit = 0.5*(T_inlet + T_exit) (temperature or some scalars).
(Note thet "f" shows cell-face values, and others are cell-center values)

But for pressure P and potential Phi ?

For pressure P,
pf_inlet = pf_exit = 0.5*(p_inlet + p_exit)
would not be an adequate condition because of the pressure loss by the duct walls .

Also for and potential Phi, I wonder if
Phif_inlet = Phif_exit = 0.5*(Phi_inlet + Phi_exit)
could be used in the solver of poisson eqn. of potential Phi.

Does anyone tell me?

Sincerely yours,
waku2005 is offline   Reply With Quote


periodic, pressure bc

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
Periodic B.C or Inlet/Outlet B.C ar_mofidi OpenFOAM 3 February 27, 2010 03:36
Collocated SIMPLE and outlet pressure yhoarau Main CFD Forum 1 April 16, 2009 09:16
About Poisson equation's B.C. in SMAC algorithm snakejoe Main CFD Forum 0 April 7, 2009 05:58
what the result is negatif pressure at inlet chong chee nan FLUENT 0 December 29, 2001 05:13
What is the Better Way to Do CFD? John C. Chien Main CFD Forum 54 April 23, 2001 08:10

All times are GMT -4. The time now is 02:29.