Venturi meter --- Highest
Rota meter
Orifice meter---- lowest
The discharge coefficient is near unity and Non-recoverable net head loss is very small.
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(to check the flow rate of water ... calculate the pressure drop
A device for measuring the flow of a liquid.
from the continuity equation A1v1 = A2v2 according to the continuity equation as the area decreases the velocity of the flow of the liquid increases and hence maximum velocity can be obtained at its throat
In Venturi meter losses are less so coefficient of discharge is higher whereas in orifice meter due to no convergent and divergent cones there are more losses and hence its coefficient of discharge is less.In venturi meter losses are low due to steamline shape of the diffuser and the pressure gradient is not abrupt as in case of orifice meter.
The discharge coefficient is near unity and Non-recoverable net head loss is very small.
Venturi Meter is a device used for measuring the flow of the fluid.
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The orifice meter is used with the orifice flow rate meter and measures things like the flow rate of natural gas. It can measure other things and companies use it for different things also. Some companies give lessons or classes in using the orifice meter.
Flow in a venturi meter refers to the rate at which a fluid passes through the device. The flow of fluid is measured by the pressure difference created between the converging and diverging sections of the venturi meter. This pressure difference is directly related to the flow rate of the fluid passing through the venturi meter.
hitler
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Orifice meter is a flow measuring device used for calculating the pressure drop,flow rate and behaviour of the fluid moving through the pipe.
The calibration curve for an orifice meter will depend on the size of the orifice, the size of the pipe and the pressure loss over the meter. Typical calibration curves have pressure (or head) loss on the vertical (y) axis and flow rate on the horizontal (x) axis.
The length of the diverging section in a venturi meter is longer than the converging section to allow the flow to gradually return to its original pressure and velocity. This helps minimize energy losses and turbulence, ensuring accurate flow measurement. The design aims to maintain steady flow conditions for optimal performance of the venturi meter.
The Cd value (coefficient of discharge) is typically higher in a nozzle meter compared to an orifice meter because the flow profile and pressure recovery characteristics are better in a nozzle meter. Nozzle meters have a converging-diverging shape, which helps in minimizing energy losses and improving the accuracy of flow measurement when compared to an orifice meter design.