What is Venturimeter? | Definition, Advantages, Disadvantages – Hydrodynamics

What is Venturimeter? | Definition, Advantages, Disadvantages – Hydrodynamics

We are giving a detailed and clear sheet on all Physics Notes that are very useful to understand the Basic Physics Concepts.

Venturimeter Definition:
It is a device used for measuring the rate of flow of liquid through pipes. Its working is based on Bernoulli’s theorem.
Rate of flow of liquid,

v = a1a2\(\sqrt{\frac{2 g h}{a_{1}^{2}-a_{2}^{2}}}\)

where, a1 and a2 are area of cross-sections of tube at broader and narrower part and h is difference of liquid columns in vertical tubes.


  • Low losses.
  • Suitable for the large diameter of the pipe.
  • It can be installed vertically, horizontally, inclined.
  • Less chance of getting stuck with sediment.


  • They are large in size and, therefore, where space is limited, they can not be used.
  • Maintenance is not easy.
  • Required more space.
  • It is expensive in installation and replacement.
  • It is not suitable for pipe diameter below then 75mm.

In physics, hydrodynamics of fluid dynamics explains the mechanism of fluid such as flow of liquids and gases. It has a wide range of applications such as evaluating forces and momentum on aircraft, prediction of weather, etc.

Flow of liquid Reynold’s Number
Equation of Continuity Energy of a Liquid
Bernoulli’s Principle Venturimeter
Torricelli’s Theorem Viscosity
Poiseuille’s Law Rate of Flow of Liquid
Stoke’s Law and Terminal Velocity Critical Velocity