Because, the scientist name VENTURI had discover that device as flow measurment. So that it call as venturimeter.
What is the working principle of venturimeter?
Venturimeter
Measurement of flow rate in a pipe
to measure the flow in any pipes
Venturimeter is the short pipe having two conical parts and portion of uniform cross section between these two parts.
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why lenght of divergent cone is larger than convergent cone in venturi meter
The ratio inlet to throat diameter vary from 1/3 to 3/4,but the most suitable is from 1/2 to 1/3
FRL unit works on venturimeter principle when any compressed air pass from any path which have liquid at bottom ,that liquid also comes with this air
venturimeter, orificemeter are some of the instruments used to measure the flow rate in pipe.
1-It decrease the rate of increase of pressure and reduces energy losses. 2-Otherwise there may form eddy current due to separation of wall.