HYDRO-STATICS ?
Contents
The Branch of science which deals with the study of fluids at rest.
Pascal’s Law
- It states that the pressure or intensity of pressure at a point in a fluid at rest is equal in all directions.
- Let consider a fluid at rest in a closed container then a change in pressure at one point will be transmitted without loss to every point of fluid and to the walls of the container.
Hydro-static Law
- Rate of increase of pressure in the vertical direction is equal to weight density of the fluid at that point at that point.
∫dp= ∫ρgdZ
Where p= pressure
Z= height from surface
Pressure Measurement Terms
Absolute Pressure
- Pressure measured with reference to absolute zero pressure.
Gauge Pressure
- Pressure measured with reference to the atmospheric pressure.
Vacuum Pressure
- Pressure which is below the atmospheric pressure.
Relationships between these different pressures
P_{abs} = P_{gauge} + P_{atm}
P_{vacuum} = P_{atm} – P_{abs}
MEASUREMENT OF PRESSURE ON A FLUID (DEVICES)
- MANOMETERS- Simple and Differential
- MECHANICAL GAUGES