Hydraulics

Pressure Head Formula

$$h=\frac{p}{\gamma}$$

Pressure Head

Height of a column of the fluid that is needed to produce the pressure “p”

Unit Pressure

$$p=\gamma h$$

Conversion of pressure head

$$hB=\frac{sgA}{sgB}hA$$

Capillary Rise/Depression

$$h=\frac{\left(4\sigma\cos\theta\right)}{\gamma D}$$

True Static Height

Height - Capillary rise/depression

Transmission of Pressure Formula

$$Pb=Pa+\gamma h$$

sg of freshwarer

1.0

sg of seawater

1.03

sg of oil

0.8

sg of mercury

13.6

γ of air$\frac{N}{m^3}$

12 $\frac{N}{m^3}$

If given pressure is not specified, assume….

gage pressure

1 atm in kPa

101.325 kPa

1 atm in mmHg

760 mmHg

1 atm in bar

1.013 bar