|
[Sponsors] |
February 8, 2010, 14:35 |
Operating Pressure!
|
#1 |
Member
Join Date: Aug 2009
Posts: 67
Rep Power: 16 |
Hi guys,
I simulate cavitation in a centrifugal pump. At the exit of the pump i have defined pressure-outlet. At the inlet velocity-inlet. I have set the operating pressure 101325 Pa. I cant understand the significance of the reference pressure location!! Where will i define it?? The point that i defined it, has gauge static pressure 0? Thanks a lot!! |
|
February 10, 2010, 05:35 |
|
#2 |
Senior Member
Jouke de Baar
Join Date: Oct 2009
Posts: 127
Rep Power: 16 |
Hi, I'm not completely sure but I think the reference pressure will be ignored in your case. I think the reference pressure is only used when you have no pressure boundary conditions (say, velocity_inlet and outflow), in order to keep the overall pressure from floating.
If you do need it, put it in a nicely behaving place, for example avoid being close to the phase-1/phase-2 interface. |
|
September 16, 2010, 18:36 |
Where is Reference Pressure Location?
|
#3 |
New Member
kamal galedarzade
Join Date: Jun 2010
Posts: 8
Rep Power: 15 |
Hi Jack1980
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.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. |
|
September 19, 2010, 07:50 |
|
#4 | |
Member
Join Date: Aug 2009
Posts: 67
Rep Power: 16 |
Hi kamal_g65,
You have to enter x,y,z at the point where there is atmospheric pressure! Quote:
|
||
September 19, 2010, 09:39 |
|
#5 |
New Member
Steven Qhin
Join Date: Jul 2010
Posts: 15
Rep Power: 15 |
That is right, if you have the pressure boundary condition in your simulation, since you are using the gauge pressure, which means the reference pressure is included already.
|
|
September 20, 2010, 04:07 |
Where is Reference Pressure Location?
|
#6 |
New Member
kamal galedarzade
Join Date: Jun 2010
Posts: 8
Rep Power: 15 |
This is means if relative pressure at inlet equal 700kPa, and i want velocity-inlet define at inlet, i have operate below:
operating pressre= 700+101=801 kPa Reference Pressure Location = it is same point at inlet surface center ( point: -526.5, -271.6, 127.4 ) |
|
July 28, 2015, 04:28 |
|
#7 | |
Senior Member
Aja
Join Date: Nov 2013
Posts: 496
Rep Power: 14 |
Quote:
Hi, what is your exact meaning of 'floating'? I am grateful that some one guide me. Thanks |
||
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
OPERATING PRESSURE | manish | FLUENT | 6 | February 25, 2011 05:40 |
operating pressure problem | alp | FLUENT | 1 | June 12, 2008 18:24 |
Operating Pressure (Natural Convection problem) | Andrew Tress | Main CFD Forum | 1 | July 3, 2006 17:00 |
Neumann pressure BC and velocity field | Antech | Main CFD Forum | 0 | April 25, 2006 03:15 |
floating operating pressure | Shankar | FLUENT | 1 | January 30, 2004 05:08 |