IDETEST Department of Energy and Industrial Apparatus Section of Fluid Mechanics, Water Turbines and Pumps Jan A...

Szantyr, e-mail: jas@pg.gda.pl, phone: 58-347-2507, room LM8
IDE - SELECTED PROBLEMS OF FLUID MECHANICS

QUESTIONS FOR THE WRITTEN TEST
1. What physical principle is described by the Navier-Stokes equation? Provide the
physical interpretation of the respective terms of this equation.
2. Write the Bernoulli equation and provide its physical interpretation.
3. Define the specific speed coefficient in turbo-machinery.
4. What parameters are included in the formula for the efficiency of the rotary
pump?
5. Characterize the laminar and turbulent flows.
6. Describe the separation of the boundary layer. In which conditions it may occur?
7. Describe the entrained mass of fluid? How does it influence the vibrations of the
solid object immersed in the fluid?
8. Describe the phenomenon of cavitation. In which conditions it may occur?
9. What are the negative consequences of cavitation in hydromachinery?
10. How are potential flows modelled in calculations?
11. How is the Finite Difference Method employed in flow calculations?
12. How is the Finite Element Method employed in flow calculations?
13. How is the Finite Volume Method employed in flow calculations?
14. How is the turbulent character of flow taken into account in numerical calculations?
15. What methods are used for determination of the free surface geometry In numerical flow calculations?
Written test will contain 5 questions selected from the above list.