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Difference between pressure, absolute pressure and Total Pressure

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Old   September 6, 2012, 04:54
Default Difference between pressure, absolute pressure and Total Pressure
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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)


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Old   September 6, 2012, 06:12
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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.
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