Absolute Pressure

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

A pressure at absolute zero can only exist in a total vacuum and any pressure above this is called absolute pressure.  Absolute pressure is the amount by which the measured pressure exceeds a perfect vacuum.

absolute PRESSURE FORMULA

\(\large{ p_a =  p_g \; + \; p_{atm}  }\)

\(\large{ p_a =  p_g \; + \; p_v  }\)         

Where:

\(\large{ p_a }\) = absolute pressure

\(\large{ p_g }\) = gauge pressure

\(\large{ p_{atm} }\) = atmospheric pressure

\(\large{ p_v }\) = vacuum pressure

Solve for:

\(\large{ p_g =  p_a \; - \; p_{atm}  }\)

\(\large{ p_{atm} =  p_a \; - \; p_g  }\)

 

Tags: Equations for Pressure