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Working of Venturimeter – Construction, Principle with Diagram

Venturimeter is a device that is used to measure the rate of flow of fluid through a pipe. This device is based on the principle of Bernoulli’s Equation. Venturimeter is named after G.B Venturi who developed the principle of venturimeter in 1797 but this principle comes into consideration with the help of C. Herschel who developed the first venturimeterin 1887.

Main parts of venturimeter :-

1. Covering part : It is the part of the venturimeter where the fluid converges .

2. Throat : It is the portion that lies in between the converging and diverging part of venturi. In the throat portion the cross section is much less than converging and diverging portion. When the reaches the throat, its velocity increases and pressure decreases.

3. Diverging part : It is the part of the venturimeter where the fluid gets diverges and the cross-section area increases.
Construction :
As stated above it has three parts converging part, throat and diverging part. These three parts are arranged in systematic order.

First one is inlet section or converging section. It is the region where the cross section emerges into conical shape for the connectivity with the throat region. . In this part cross section area decreases from beginning to ending. This section is connected to inlet pipe on one end and cylindrical throat on the other end. The angle of convergence is generally 20-22 degrees .

Second one is cylindrical throat .It is the middle part of the venturimeter. It is the cylindrical pipe in venturimeter through which the fluid passes after converging in the convergent section. Throat has generally a diameter of throat is half the diameter of pipe. The diameter of the throat remains same through out its length.



Working :-


Expression for the rate of flow through Venturimeter
Consider a venturimeter is fitted in a horizontal pipe through which fluid ( water ) is flowing as shown in figure below.


Let a1 = cross-section area of inlet pipe
d1= diameter of inlet pipe
v1 = velocity at inlet pipe
p1 = pressure at inlet pipe

also,
a2 = cross-section area of throat
d2= diameter of throat
v2 = velocity at throat
p2 = pressure at inlet throat

Venturimeter is a device that is used to measure the rate of flow of fluid through a pipe. This device is based on the principle of Bernoulli's Equation. Venturimeter is named after G.B Venturi who developed the principle of venturimeter in 1797 but this principle comes into consideration with the help of C


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Venturimeter derivation in hindi || Venturimeter derivation class 11 || venturimeter fluid mechanics

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Bernoulli's practical in Hindi || Venturimeter practical || venturimeter experiment ||gear institute