Question

Reynolds Experiments

Aim- The aim of the experiment is to investigate different flow regimes in pipe and find critical Reynold number

Answer 1

Solution:

Reynolds Experiments

Aim- The aim of the experiment is to investigate different flow regimes in pipe and find critical Reynold number.

Apparatus-

1. Tank filled with water
2. Glass tube
3. A small reservoir filled with dye
4. Valve at the outlet of glass tube
5. A stopwatch etc.

Procedure-

1. First fill the tank with water and leave it for some time as the water in the tank should come to rest.
2. Now fill the reservoir with a dye.
3. Then record the temperature of water.
4. Flow through the glass tube at a very low rate by partially opening the outlet valve of a glass tube.
5. Observe the appearance of dye in the glass tube and note down the type of flow obtained for that particular discharge.
6. Take a stopwatch and note down the volume of water.
7. Repeat the above procedure for different discharge rates and calculate Reynolds’s number for each type of flow.

Calculations/Result:

Discharge, Q = Volume / time

Volume of water collected in tank in t seconds, V = area of tank X Rise of water level in t seconds

Velocity of flow, v = Discharge / area of glass tube

Reynolds number,   Re =