CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > Siemens > STAR-CCM+

Boundary Condition Questions

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

LinkBack Thread Tools Search this Thread Display Modes
Old   September 2, 2010, 17:34
Default Boundary Condition Questions
New Member
Join Date: Sep 2010
Posts: 3
Rep Power: 15
malfonso1286 is on a distinguished road
I have just started using STAR-CCM+ and I am unsure how to set my boundary condition. I have a pipe-like chamber with a total for 4 inlets and 1 outlet. Inside the chamber the pressure is supposed to be a constant 0.3 atm of helium. The outlet goes to a environment with zero pressure, a vacuum. The helium is sucked out of the chamber through the outlet and then is replaced by helium coming through the 4 inlets, keeping the pressure constant. What boundary condition should I be using? Do I need to set the reference pressure to 0.3 atm?
malfonso1286 is offline   Reply With Quote

Old   September 12, 2010, 18:07
Senior Member
Join Date: Oct 2009
Location: Germany
Posts: 636
Rep Power: 21
abdul099 is on a distinguished road

it's not necessary to set the reference pressure to 0.3 atm. You can choose whatever you want, you only have to set the right pressures relative to the reference pressure.

Do you expect an appreciable pressure difference between the inlet and the chamber?
abdul099 is offline   Reply With Quote


boundary conditions, constant pressure

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
inlet velocity boundary condition murali CFX 5 August 3, 2012 08:56
asking for Boundary condition in FLUENT Destry FLUENT 0 July 27, 2010 00:55
problem with boundary condition??? smn CFX 5 November 24, 2009 06:37
How to set boundary condition in Fluent for the fo Peiyong FLUENT 1 November 10, 2006 11:44
Help Urgent about changing boundary condition Anjum Naveed FLUENT 7 August 14, 2006 12:25

All times are GMT -4. The time now is 16:40.