Experimental and theoretical study of fluid dynamics



  • SS centrifugal pump with On/Off switch.
  • 90L storage Tank.

7 parallel pipe-lines

  • Plexiglas Venturi.
  • Plexiglas diaphragm.
  • Needle valve 1″.
  • Rough piping, equipped with four quick fitting connectors spaced of 0.5 m and 1 m to measure pressure drops for 0.5 m, 1m, 1.5m and 2m lengths.
  • Pipe with ink injection.
  • Piping brutal narrowing ND 25 / ND 10, brutal enlargement from ND 10 to ND 25, Series of four 90° bends ND 25.
  • Smooth piping equipped with four quick fitting connectors spaced of 0.5 m, 1m and 2m for pressure measurement.
  • Smooth piping equipped with four quick fitting connectors spaced of 0.5 m and 1m for pressure measurement.
  • Manual vacuum pump.


  • 2 Flowmeters.
  • Differential pressure transmitter.
  • Manual differential pressure manometer.
  • 2 manometers.
  • Digital indication temperature.


Dim: 330 x 90 x 180cm
SS tubular framework 40 x 40mm


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Study of pressure drops across various components

Valves, elbows, abrupt changes in pipe diameter

Pipes of different diameter, length and roughness


Comparison between flow rate measurement techniques


Orifice measurement (Venturi  and diaphragm)

Filling rate measurement


Comparison between experimental and theoretical values

Theoretical pressure drop calculations

Theoretical flow rate calculations in accordance with standard EN
ISO 5167-1 for Venturi tubes and membranes



This unit for fluid dynamics and study of energy loss is composed of various straight hydraulic

pipes of different diameters and material.The unit has the same specificities commonly encountered

in industrial hydraulic networks: elbows, valves, venturi meters for the measurement of flow rate,

and abrupt narrowing or widening of the tubes, etc.


This system functions in a closed circuit and the fluid circulation is generated by a centrifugal pump.


The measurement of energy loss is made by a differential pressure sensor.

The teaching objectives of the study are to:

– compare the flow rate measurement methods e.g. flow meter, orifice-meter (diaphragm), and venturi meter.

– verify the law of turbulent flow in the form dP = k Qv2

– determine, for each length or irregularity, the energy loss expressed:

o in equivalent length of a reference tube

o in terms of energy loss coefficient z


These different values will be compared qualitatively and quantitatively with respect to the different charts given in the literature.