Question

3- Most of the lab experiments are designed to validate the theories that you have learnt in the class. If you have found that the theory does not follow the experiment [i.e. a difference between theoretical results and lab (experimental) results], what are the factors causing this difference? 1-Viscosity measurement experiment 2-Center of pressure(hydrostatic force on plane surface) experiment 3-Stability and buoyancy experiment 4-Bernoulli's theory experiment 5-Calibration of flow meters experiment 6-lmpact of flow jet - momentum principle experiment

Answer 1

Bernaulies Experiment (a) Bernauli's eq^n has the following ideal conditions i.e it is applicable for viscous compressible and unsteady flow of fluid lost i.e is generally not possible to generate the above ideal conditions to all effect the results of experimental and theoretical values (1) Viscosity measurement Theoretically viscosity is a function of density and some constant .The constants is directly proportion to the time of flow But in experimental process some cross may occur due to such a minor mature of corrections The instrumental results differs from the theoretical ones in capillary action which is generally possible for relatively low viscosity fluids (2) center of pressure experiment: - In experiments, the summation of amount about the pinolis of apparatus, The buouncy force is neglected which comes form the air outside the test model . Because of density of air a minor fraction of the material of model and the fluid