# Homework Help: Complete turbulence

1. Jan 24, 2016

### werson tan

1. The problem statement, all variables and given/known data
why the author gave that the complete turbulenece is indpendent on the Reynold number ?

2. Relevant equations

3. 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

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2. Jan 24, 2016

### SteamKing

Staff Emeritus
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.

3. Jan 24, 2016

### werson tan

Can you explain this phenomenon?

4. Jan 24, 2016

### SteamKing

Staff Emeritus
5. Jan 25, 2016