Fluid mechanics deals with fluids like liquids and gases. Liquids take the shape of their container but do not have a definite shape, while gases do not take the shape of any container. Liquids are denser and non-compressible compared to gases, which are less dense and compressible. Common examples of fluids in daily life include air conditioning, water, fuels for vehicles, and fluids involved in refrigeration and food. Water is the most widely used fluid in civil engineering projects like dams, canals, and concrete construction due to its abundance on Earth. Fluids can also be categorized as compressible or non-compressible, ideal or real, and Newtonian or non-Newtonian.

1. Fluid mechanics

2. What is fluid?
Matter exists in two forms: Solid and Fluid
Anything which can flow
Which does not have specific shape
Common types: Liquid and Gas

3. Fluid mechanics in daily life
AC while sleeping (Gas)
Use of water
Use of petrol/diesel in cars
Tyre pressure
Refirgirator
Food (liquids like water, milk etc)
Ships
Flights (Aero dynamics)

4. Difference between Liquid and Gas
SN Liquid Gas
1 Liquid does not have specific shape.
It takes shape of container.
Does not take shape of container
2 Density is high Density is very very low
3 Liquids are non compressible Gases are compressible
4 Has definite mass Does not have mass
5 Posseses properties like surface
tension, capillary action etc
Does not Posses properties like
surface tension, capillary action etc
6 Eg. Petrol, kerosene, water E. g. Nitrogen, oxygen etc

5. Water as a fluid
In civil engineering, we deal maily with fluids and that too water.
(Dams, canal, or use of water in concrete)
Water is largest consumed material on earth. (For living +
construction)

6. Types of fluids
Gas and liquid
Compressible and non-compressible fluids
Ideal and real fluid
Newtonian and non-newtonian fluid