CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT

Operating condition in Fluent

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   April 25, 2010, 23:59
Default Operating condition in Fluent
  #1
Senior Member
 
MASOUD
Join Date: Mar 2009
Posts: 102
Rep Power: 17
MASOUD is on a distinguished road
I'm wondering what's the point of "Reference Pressure Location" in Operating Condition panel???
When I have no idea about the pressure at a location, how to set these parameters in this panel?
MASOUD is offline   Reply With Quote

Old   April 27, 2010, 08:07
Default
  #2
Member
 
Leonardo Giampani Morita
Join Date: Apr 2009
Location: Paris, France
Posts: 58
Rep Power: 17
leonardo.morita is on a distinguished road
From Fluent 12.0 User's Guide:

"For incompressible flows that do not involve any pressure boundaries,
ANSYS FLUENT adjusts the gauge pressure field after each iteration to keep it from floating. This is done using the pressure in the cell located at (or nearest to) the reference pressure location. The pressure value in this cell is subtracted from the entire gauge pressure field; as a result, the gauge pressure at the reference pressure location is always zero. If pressure boundaries are involved, the adjustment is not needed and the reference pressure location
is ignored.
The reference pressure location is, by default, the cell center at or closest to (0,0,0). There may be cases in which you might want to move the reference pressure location, perhaps locating it at a point where the absolute static pressure is known (e.g., if you are planning to compare your results with experimental data). To change the location, enter new (
X,Y,Z) coordinates for Reference Pressure Location in the Operating Conditions dialog box."

Hope your question is answered :-)
leonardo.morita is offline   Reply With Quote

Old   September 16, 2010, 17:48
Unhappy 2Where is Reference Pressure Location?
  #3
New Member
 
kamal galedarzade
Join Date: Jun 2010
Posts: 8
Rep Power: 16
kamal_g65 is on a distinguished road
Quote:
Originally Posted by leonardo.morita View Post
From Fluent 12.0 User's Guide:


"For incompressible flows that do not involve any pressure boundaries,
ANSYS FLUENT adjusts the gauge pressure field after each iteration to keep it from floating. This is done using the pressure in the cell located at (or nearest to) the reference pressure location. The pressure value in this cell is subtracted from the entire gauge pressure field; as a result, the gauge pressure at the reference pressure location is always zero. If pressure boundaries are involved, the adjustment is not needed and the reference pressure location
is ignored.
The reference pressure location is, by default, the cell center at or closest to (0,0,0). There may be cases in which you might want to move the reference pressure location, perhaps locating it at a point where the absolute static pressure is known (e.g., if you are planning to compare your results with experimental data). To change the location, enter new (X,Y,Z) coordinates for Reference Pressure Location in the Operating Conditions dialog box."


Hope your question is answered :-)


Hi All.
I want simulate a two stage centrifugal pump, by Fluent. Pump contains: inlet that is a bent pipe, two impellers, diffusers and outlet is a dual volute. I want use Multiple Reference frame (MRF), but, whereas the pump geometry are 3-D and complex shape
There are not pressure-related boundary conditions(e.g., pressure inlet or pressure outlet) in my problem B.C (because I used Velocity-inlet for inlet B.C and Outflow at outlet). Do I enter (X, Y, Z) coordinates for Reference Pressure Location? (for example, the inlet surface center are (-526.5, -271.6, 127.4 ), Do I enter same point for Reference Pressure Location?)
kamal_g65 is offline   Reply With Quote

Old   September 16, 2010, 17:50
Default w
  #4
New Member
 
kamal galedarzade
Join Date: Jun 2010
Posts: 8
Rep Power: 16
kamal_g65 is on a distinguished road
I want simulate a two stage centrifugal pump, by Fluent. Pump contains: inlet that is a bent pipe, two impellers, diffusers and outlet is a dual volute. I want use Multiple Reference frame (MRF), but, whereas the pump geometry are 3-D and complex shape.
1- There are not pressure-related boundary conditions(e.g., pressure inlet or pressure outlet) in my problem B.C (because I used Velocity-inlet for inlet B.C and Outflow at outlet). Do I enter (X, Y, Z) coordinates for Reference Pressure Location? (for example, the inlet surface center are (-526.5, -271.6, 127.4 ), Do I enter same point for Reference Pressure Location?)
I am confused in the model. Please help me.
Thanks.
kamal_g65 is offline   Reply With Quote

Reply

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
Natural Convection (Operating Pressure condition) Andrew Tress FLUENT 1 July 3, 2006 18:27
Outflow boundary condition in FLUENT Sri FLUENT 5 December 5, 2003 04:42
How to implement H1 Boundary Condition in Fluent? Jake FLUENT 0 September 29, 2003 11:41
Pressure in operating condition vs pressure in ini cheong FLUENT 1 November 10, 2001 09:34
Boundary Condition for Fluent 4. Sanjib Das Sharma FLUENT 1 September 13, 2001 12:34


All times are GMT -4. The time now is 09:35.