Learning Forum

[obaid]

Hi everyone,

 

i am doing a simulation for the pump ,i have my inlet boundary condition as a velocity inlet and outlet boundary condition as pressure outlet(0 gauge) my question is that

1.when i open cfd post after solution, and when i see the contours of pressure at outlet it doesnot show me 0 gauge pressure it gives me some negative value.

2.does the pressure in the results option shows the gauge pressure or absoulte pressure?

 

thanks in advance to everyone

[Rob]

If you're using Fluent just post process in Fluent: it's quicker & you have static, total & absolute pressure available without any guessing. 

[DrAmine]

1/gauge pressure+operating pressure= Absolute pressure

2/Pressure in CFD-Post is the gauge pressure

3/As rwoolhou  better to use Fluent if you are running Fluent for post-processing

[obaid]

thanks sir,

but this doesn't  answer my question , what i want to ask is that a pressure boundary condition is a part of setup or solution? if it is a part of setup then the pressure at the outlet has to be 0 gauge after the solution if not then it can change.

[Rob]

Look at the multiple reference frame tutorial from the Help system: it's a compressor so same principle as a pump.