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
