bernoulli's theorem

ABSTRACT / SUMMARY The main purpose of this experiment is to investigate the validity of the Bernoulli equation when applied to the steady flow of water in a tape red duct and to measure the flow rate and both static and total pressure heads in a rigid convergent/divergent tube of known geometry for a range of steady flow rates. The apparatus used is Bernoulli’s Theorem Demonstration Apparatus, F1-15. In this experiment, the pressure difference taken is from h1- h5. The time to collect 3 L water in the tank was determined. Lastly the flow rate, velocity, dynamic head, and total head were calculated using the readings we got from the experiment and from the data given for both convergent and divergent flow. Based …show more content…
This is shown in all the results tables,where the velocity of water that flows in the tapered duct increases asthe duct area decreases, regardless of the pressure difference and typeof flow of each result taken.From the analysis of the results, we can conclude that for bothtype of flow, be it convergent or divergent, the velocity increases as the pressure difference increases. For instance, the velocities at pressurehead h5 at pressure difference of 50 millimetres, 100 millimetres and150 millimetres for convergent flow are 0.8308 m/s, 1.5290 m/s and1.2740 m/s respectively, which are increasing. The same goes todivergent flow, whereby the velocities are decreasing when the pressuredifference between h1and h5 is increased. Note that for divergent flow,the water flows form pressure head h5 to h1, which is from narrow tubeto wider tube. Next, the total head value for convergent flow is calculated to bethe highest at pressure head h1and the lowest at pressure head h5,whereas the total head for divergent flow is in a different case where itis calculated to be the highest at pressure head h5 and the lowest at pressure head h1.There must be some error or weaknesses when taking themeasurement of each data. One of them is, the observer must have not read the level of static head properly, where the eyes are not perpendicular to the water level on the