PPT: Bernoulli’s Equation | Fluid Mechanics for Civil Engineering - Civil Engineering (CE) PDF Download

 Page 1


? no work or heat interaction between a 
fluid element and the surrounding takes 
place.
? The flow must be incompressible
? Friction by viscous forces has to be 
negligible.
Page 2


? no work or heat interaction between a 
fluid element and the surrounding takes 
place.
? The flow must be incompressible
? Friction by viscous forces has to be 
negligible.
? This equation was developed first by Daniel 
Bernoulli in 1738.
flow work 
per unit 
mass
kinetic 
energy per 
unit mass
potential 
energy per 
unit mass
Page 3


? no work or heat interaction between a 
fluid element and the surrounding takes 
place.
? The flow must be incompressible
? Friction by viscous forces has to be 
negligible.
? This equation was developed first by Daniel 
Bernoulli in 1738.
flow work 
per unit 
mass
kinetic 
energy per 
unit mass
potential 
energy per 
unit mass
Where, h
f
represents the frictional work done (the 
work done against the fluid friction) per unit weight 
of a fluid element while moving from a station 1 to 2 
along a streamline in the direction of flow.
Page 4


? no work or heat interaction between a 
fluid element and the surrounding takes 
place.
? The flow must be incompressible
? Friction by viscous forces has to be 
negligible.
? This equation was developed first by Daniel 
Bernoulli in 1738.
flow work 
per unit 
mass
kinetic 
energy per 
unit mass
potential 
energy per 
unit mass
Where, h
f
represents the frictional work done (the 
work done against the fluid friction) per unit weight 
of a fluid element while moving from a station 1 to 2 
along a streamline in the direction of flow.
? Orifice meter
? Venturi meter
Page 5


? no work or heat interaction between a 
fluid element and the surrounding takes 
place.
? The flow must be incompressible
? Friction by viscous forces has to be 
negligible.
? This equation was developed first by Daniel 
Bernoulli in 1738.
flow work 
per unit 
mass
kinetic 
energy per 
unit mass
potential 
energy per 
unit mass
Where, h
f
represents the frictional work done (the 
work done against the fluid friction) per unit weight 
of a fluid element while moving from a station 1 to 2 
along a streamline in the direction of flow.
? Orifice meter
? Venturi meter
? It is a device used for the measurement of 
flow in a pipeline.
? Based on Principle of Bernoulli’s theorem.
? It consist of 3 parts:
a) Converging Cone.
b) Short cylindrical throat.
c) Diverging cone.