Opperating pressure?

Jonny6001 · September 27, 2009, 14:06

Hello, hopefully just a quick, simple question.

What exactly is the user defined opperating pressure used for? Does it only get used for absolute values of pressures in the results relative to the opperating pressure? Or does it actually affect the results of a solution?

I hope you understand what I mean.

Regards

ivanbuz · September 27, 2009, 17:36

is it possible to affect the properties of the fluid such as ideal gas? I am not sure.

herntan · September 29, 2009, 20:55

Operating pressure + Gauge pressure = Absolute pressure
u will have parameter on boundary condition which only let u input gauge pressure.
Operating pressure was default as atmosphere pressure.

Jonny6001 · September 30, 2009, 02:45

Thanks, that's what I was predicting.

But does it get used in any of the solution calculations directly, or just addedd on to the gauge pressure at the end to make the pressures in the results relative to your opperating pressure, rather than just being a local solution pressure

herntan · September 30, 2009, 02:57

Yes. Operating pressure does matter in the calculation. They will use it in every single calculation require pressure.
anyhow, just make sure ur parameter input to the simulation is correct.
Double check if the pressure u got is gauge pressure or absolute pressure.

September 27, 2009, 14:06	Opperating pressure?	#1
Jonny6001 Member Jonny Join Date: Aug 2009 Posts: 72 Rep Power: 16	Hello, hopefully just a quick, simple question. What exactly is the user defined opperating pressure used for? Does it only get used for absolute values of pressures in the results relative to the opperating pressure? Or does it actually affect the results of a solution? I hope you understand what I mean. Regards

September 29, 2009, 20:55		#3
herntan Senior Member YH Tan Join Date: Mar 2009 Location: Malaysia Posts: 119 Rep Power: 17	Operating pressure + Gauge pressure = Absolute pressure u will have parameter on boundary condition which only let u input gauge pressure. Operating pressure was default as atmosphere pressure. __________________ Herntan, Add Reputation if I am right

September 30, 2009, 02:57		#5
herntan Senior Member YH Tan Join Date: Mar 2009 Location: Malaysia Posts: 119 Rep Power: 17	Yes. Operating pressure does matter in the calculation. They will use it in every single calculation require pressure. anyhow, just make sure ur parameter input to the simulation is correct. Double check if the pressure u got is gauge pressure or absolute pressure. __________________ Herntan, Add Reputation if I am right

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September 27, 2009, 17:36		#2
ivanbuz Member Ivan Join Date: May 2009 Posts: 85 Rep Power: 16	is it possible to affect the properties of the fluid such as ideal gas? I am not sure.

September 30, 2009, 02:45		#4
Jonny6001 Member Jonny Join Date: Aug 2009 Posts: 72 Rep Power: 16	Thanks, that's what I was predicting. But does it get used in any of the solution calculations directly, or just addedd on to the gauge pressure at the end to make the pressures in the results relative to your opperating pressure, rather than just being a local solution pressure