Question

plz answer fast..........
what should be maximum average velocity of water in a tube of diameter 0.5 cm so that the flow is laminar?
Given coefficient of viscosity = 0.00125 Nsec/m².

Answer 1

Answer is 57.5 cm/sec.

Reynolds's formula for fluid flow:
Re = row * v * D / μ
Re = Reynolds's number < 2300 for laminar stream lined non-turbulent flow.
row = density = 1000 kg/m^3
μ = dynamic or kinematic viscosity = 0.00125 Pa-s.
D = inner diameter = 0.005 meter.

So v = Re * μ / (row* D)
v < 57.5 cm/s.

Answer 2

Answer:

Answer is 57.5 cm/sec.

Reynolds's formula for fluid flow:

Re = row * v * D / μ

Re = Reynolds's number < 2300 for laminar stream lined non-turbulent flow. row = density = 1000 kg/m^3

μ = dynamic or kinematic viscosity = 0.00125 Pa-s.

D = inner diameter = 0.005 meter.

So v = Re * μ / (row* D)

v < 57.5 cm/s.

Explanation: