The properties of the steady flow

1.      The rate of flow in the tube A2 is equal ,to that in the tube A1
Q1=Q2

2.         The mass of the fluid that enters the tube at a certain time is equal to the mass of the fluid that exits from the tube at the same time.

3.         The density of the stream lines in A1 is greater than their density in A2.

4.         The number of the stream lines in the tube A1 is equal to the number of stream lines in the A2.

5.         The ratio A1/A2=V1/V2.

6.         The fluid speed at any point inside the tube is inversely proportional to the cross-sectional area of the tube at this point  V a 1/A.

7.      The distance covered by the liquid at the narrow part of the tube at certain time is longer than that covered at the wider part at the same time.

The conditions of the fluid to form steady flow:

1.      The fluid is in compressible.

2.      The fluid is not viscous.

  The flow tube:

It is a tube both ends are opened & smoothly inward has different cross-sectional area.

  Viscosity:

It is the property of matter which tends to prevent motion of one part over another.

It is the property that the fluid resists its flow.

It is the property that the fluid resists the flow of solid in it.

Experiments to show viscosity:

1.      On putting water on a horizontal surface, the water spreads out rapidly on the hand, Glycerin does not spread out rapidly.

2.      On stirring liquids for a certain interval of time, highly viscous liquid show high resistance to motion (honey) & they soon come to rest.

3.      Let two similar steel balls are left to sink in two similar jars filled with water & Glycerin respectively.

The steel ball in the Glycerin jar takes a longer time to reach the bottom therefore Glycerin is more viscous than water.