CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   FLUENT (http://www.cfd-online.com/Forums/fluent/)
-   -   Operating condition in Fluent (http://www.cfd-online.com/Forums/fluent/75431-operating-condition-fluent.html)

MASOUD April 25, 2010 23:59

Operating condition in Fluent
 
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?

leonardo.morita April 27, 2010 08:07

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 :-)

kamal_g65 September 16, 2010 17:48

2Where is Reference Pressure Location?
 
Quote:

Originally Posted by leonardo.morita (Post 256453)
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 September 16, 2010 17:50

w
 
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.


All times are GMT -4. The time now is 06:17.