Q. Explain Hydraulic Formula?

This relates to pressure gradient and velocity of flow:

V2 = (Cv)2 2gh or V = (Cv) 2gh

Wherein, V = velocity of flow
Cv = coefficient of velocity

g = acceleration due to gravity (980 cm/sec/sec)

h = pressure gradient in cm of H₂O

Combining these two equations, we get:

The final equation for calculation of valve orifice area A in cm² is:

Where, CO = Cardiac output in cm³/ min

DFP = diastolic filling period (sec/beat)

SEP = systolic ejection period (sec/beat)

HR = heart rate (beats/min)

C = empirical constant

P = pressure gradient