Why is complete turbulence independent of Reynolds number?

[werson tan]

Homework Statement

why the author gave that the complete turbulenece is indpendent on the Reynold number ?

Homework Equations

The Attempt at a Solution

For the turbulence to occur , the Reynold number must be higher than certain value , am i right . So , IMO , turbulenet is dependent on the Reynold number

 

[SteamKing]

Homework Statement

why the author gave that the complete turbulenece is indpendent on the Reynold number ?

Homework Equations

The Attempt at a Solution

For the turbulence to occur , the Reynold number must be higher than certain value , am i right . So , IMO , turbulenet is dependent on the Reynold number

You're not correctly comprehending what this slide is saying.

First, it's discussing the friction factor f as it's plotted on the Moody diagram:

​

In the zone where the flow is completely turbulent, i.e. to the right of the dashed line, the friction factor is constant w.r.t. the Reynolds number. In this region, the friction factor f depends on the relative pipe roughness only.

 

[werson tan]

You're not correctly comprehending what this slide is saying.

First, it's discussing the friction factor f as it's plotted on the Moody diagram:

​

In the zone where the flow is completely turbulent, i.e. to the right of the dashed line, the friction factor is constant w.r.t. the Reynolds number. In this region, the friction factor f depends on the relative pipe roughness only.

You're not correctly comprehending what this slide is saying.

First, it's discussing the friction factor f as it's plotted on the Moody diagram:

​

In the zone where the flow is completely turbulent, i.e. to the right of the dashed line, the friction factor is constant w.r.t. the Reynolds number. In this region, the friction factor f depends on the relative pipe roughness only.

Can you explain this phenomenon?

 

[SteamKing]

Can you explain this phenomenon?

You can read a more detailed explanation here:

https://www.uio.no/studier/emner/matnat/math/MEK4450/h11/undervisningsmateriale/modul-5/Pipeflow_intro.pdf

 

[werson tan]

You can read a more detailed explanation here:

https://www.uio.no/studier/emner/matnat/math/MEK4450/h11/undervisningsmateriale/modul-5/Pipeflow_intro.pdf

this is the book that i use . can you expalin why during the complete turbulent , it is independent of reynold number ?