Question

Quastion 1:

choose the right answer for the following questions:

a) Euler’s equation arises from neglecting the …………. Terms in the more general Navier-Stokes equations.

1- Density 2- Pressure 3-Viscosity 4-None

b) A……………. is used to decelerate a flowing fluid to zero by a frictionless process, thereby allowing the measurement of stagnation pressure.

1-Static pressure probe 2-pitot tube 3-orifice plate 4-none

c) There is a flow probe that depend on 5 parameters and has 3 independent Dimensions. How many pi parameters will that flow problem have?

1-3 2-5 3-2 4-Not enough information

D) The Reynolds number compares initial to ……   effect in a flow problem.

1- Pressure 2- Surface tension 3-Viscus 4- none  

Answer 1

a) Euler’s equation arises from neglecting the 3-Viscosity Terms in the more general Navier-Stokes equations.

b) A…1-Static pressure probe…………. is used to decelerate a flowing fluid to zero by a frictionless process, thereby allowing the measurement of stagnation pressure

explanation: When the flow from a reservoir takes place isentrpoically, the static pressure record of the fluid in the reservoir indicates the stagnation pressure of the fluid. This situation of measuring pressure is analogous when the flowing stream is brought to rest isentropically

c) There is a flow probe that depend on 5 parameters and has 3 independent Dimensions. How many pi parameters will that flow problem have?

ans : no of pi parameter two that is (n-m)

D) The Reynolds number compares initial to …3-Viscus…   effect in a flow problem.