Flow measurement is essential in industries such as oil, power, chemical, food, water, and waste-treatment industries.
The flow quantity is determined by volume-flow rate, mass-flow rate or flow velocity.
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Some important flow meters are
Orifice plate
The Orifice plate is a device used for measuring flow rate. It also used for reducing pressure.
It uses Bernoulli’s Principle which states that “there is a relationship between the pressure of the fluid and the velocity of the fluid. When the velocity increases, the pressure decreases, and vice versa.”
Venturi Tube
The simplest apparatus is a tubular setup known as a Venturi tube or simply a venturi.
Pitot tube
Pitot tube or Pitot probe is used to measure fluid flow velocity.
Ultrasonic flow meter
There are two types of ultrasonic flow meters, doppler ultrasonic flowmeter, and transit-time ultrasonic flow meter.
Next, Chapter-16 | Advance Measurement (Universal Measuring Machine)
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Flow measurement methods other than positive-displacement flowmeters rely on forces produced by the flowing stream as it overcomes a known constriction, to indirectly calculate flow. Flow may be measured by measuring the velocity of fluid over a known area. For very large flows, tracer methods may be used to deduce the flow rate from the change in concentration of a dye or radioisotope.
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