# Chemical Engineering - Fluid Mechanics - Discussion

Discussion Forum : Fluid Mechanics - Section 1 (Q.No. 2)
2.
Laminar flow of a Newtonion fluid ceases to exist, when the Reynolds number exceeds
4000
2100
1500
3000
Explanation:
No answer description is available. Let's discuss.
Discussion:
14 comments Page 1 of 2.

Mahone said:   7 years ago
For circular pipes, the Reynolds number is used to classify flows as follows.

<2000 laminar flow.
2000-4000. Transitional flow.
>4000 turbulent flow.
(4)

Sanjeev gupta said:   5 years ago
Laminar flow equal and less than 2100 Reynolds number.
(1)

Mishree lal said:   4 years ago
For laminor flow Reynolds number is equal or less than 2100.
(1)

For laminar flow, Re should be equal to or less than 2100.

Laminar flow is less than or equal to 2100.

The above question doesn't mention about the system.
we have two type of value for laminar.

1. for circular pipe----- Re<= 2100
2. for flat plate ------- Re<= 5*10^5

For flow in a conduit:
Re<2100 Laminar Flow, Sheer Stress depends on viscosity but not on density.
2100<Re<4000 : Transient Flow
Re>4000 Turbulent flow depends on density.