Difference between pressure, absolute pressure and Total Pressure

shaswat · September 6, 2012, 05:54

Dear friends

I have a very basic questions which I cannot come to the conclusion

what is the difference between absolute pressure, Pressure and Total pressure.

When shall I measure pressure and when shall i measure Total pressure ?

Let's say a sensor is placed in the middle of the flow, what shall i use to specify pressure ( pressure or total pressure or absolute pressure)

Regards

Govind

ghorrocks · September 6, 2012, 07:12

In CFX these variables are defined as:

* Absolute pressure is the.... absolute static pressure
* Pressure is the static pressure above the reference pressure
* Total pressure is the pressure plus the dynamic head.

For what these terms mean and what sensors would read have a look in any fluid mechanics textbook. That is really basic stuff.

September 6, 2012, 05:54	Difference between pressure, absolute pressure and Total Pressure	#1
shaswat Senior Member Shashwat Join Date: Nov 2011 Posts: 107 Rep Power: 15	Dear friends I have a very basic questions which I cannot come to the conclusion what is the difference between absolute pressure, Pressure and Total pressure. When shall I measure pressure and when shall i measure Total pressure ? Let's say a sensor is placed in the middle of the flow, what shall i use to specify pressure ( pressure or total pressure or absolute pressure) Regards Govind

September 6, 2012, 07:12		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	In CFX these variables are defined as: * Absolute pressure is the.... absolute static pressure * Pressure is the static pressure above the reference pressure * Total pressure is the pressure plus the dynamic head. For what these terms mean and what sensors would read have a look in any fluid mechanics textbook. That is really basic stuff. sanjiiv, Hemishmistry04 and Mf515 like this.

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