The main purpose of this experiment is to verify validity Bernoulli’s principle, a fundamental relationship between velocity and pressure of flowing fluids. In this experiment, special apparatus is used which consist of several tubes and other equipment in order to calculate pressure, height and velocity of flows. It is possible to determine velocity, Reynolds number and flow regime after determination of pressure in flow and height of water. Bernoulli's Principle is a physical principle formulated that states that "as the speed of a moving fluid increases, the pressure within the fluid drop off. Bernoulli's principle is named after the Swiss scientist Daniel Bernoulli who published his principle in his book Hydrodynamics in 1738. Bernoulli’s…show more content… For the first flowrate:
For the second flow rate
The following graphs illustrate velocities derived from flowrate and Bernoulli equation. (Flowrate 319l/h) Graph 2
Flow rate (419l/h) Graph 3
It is possible to show that how Reynolds numbers varies along venturi meter.
For the first flow rate:
6521
For the second flow rate:
7143
The graph 4 shows the change in Reynolds numbers along venturi meter for both flowrates. 4. Discussion of results
Generally, the experiment has been taken successfully despite some experimental errors. From the result obtained through this experiment, it has been observed that when the pressure difference increase, the flowrates of the water increase and the velocities also increase for both flow regimes. The result shows a rise at each manometer tubes when the pressure difference elevates. As fluid flows from wider pipe to the narrower one, the speed of the flowing fluid increases. This is represented in all the results tables, where the velocity of fluid which flows in the tapered duct increases as the duct area decreases, irrespective of the pressure difference and type of flow of each result