In fluid dynamics, 4 laws are used to analyse the fluid flow.
- Laws of mechanics
- Conservation of mass
- Conservation of energy
- Conservation of momentum
These laws are applied to a specific volume of the fluid in motion, and it’s called as control volume.
Control volume
A fixed volume, through which a fluid flows. Can either be real or imaginary.
Conservation of mass
Mass cannot be created nor destroyed.
Conservation of energy
Energy cannot be created nor destroyed. Can only be converted from one form to another.
Conservation of momentum
A mass cannot gain or lose momentum unless a resultant force is exerted on it.