Featured topics
Pressure and fluid mechanics
Essential pressure and fluids formulas: definition, hydrostatics, Bernoulli and mass flow with worked examples.
Key formulas
- Pressure
Ratio of the perpendicular force to the area.
- Hydrostatic pressure
The pressure in a fluid at rest increases linearly with depth.
- Pressure difference in a fluid
The pressure difference between two points in a fluid at rest depends on the height difference.
- Bernoulli's equation
Along a streamline, the sum of pressure, kinetic term, and gravitational term is constant.
- Mass flow rate
Mass of fluid crossing a section per unit time.