Written by Jerry Ratzlaff on . Posted in Dimensionless Numbers

Pressure gradient, abbreviated as $$p_g$$, is a dimensionless number describing which direction and at what rate the pressure changes the most at a specific location.

$$\large{ \frac{ d p }{ d x} = \frac{ \Delta p }{ \Delta x } }$$

Where:

$$\large{ d }$$ = differential

$$\large{ x }$$ = distance

$$\large{ \Delta x }$$ = distance differential, distance between pressures

$$\large{ p }$$ = pressure

$$\large{ \Delta p }$$ = pressure differential, high - low pressure