written 6.2 years ago by | modified 3.2 years ago by |
Write a short note on Moody’s diagram.
(5 Marks) May-2018, Dec-2018
Subject Fluid Mechanics 2
Topic Turbulent Flow
Difficulty Low
written 6.2 years ago by | modified 3.2 years ago by |
Write a short note on Moody’s diagram.
(5 Marks) May-2018, Dec-2018
Subject Fluid Mechanics 2
Topic Turbulent Flow
Difficulty Low
written 6.1 years ago by | modified 6.0 years ago by |
1) It is a graph in non-dimensional form that relates the Darcy-weisbach friction factor (FD), Reynolds number (Re) and surface roughness for fully developed flow in a circular pipe.
2) It can be used to predict pressure drop or flow rate down such a pipe.
3) Formula for pressure drop (ΔP)
ΔP=ρghf.
4) Moody's diagram can be divided into two regims of flow, that is laminar and turbulent.
5) For laminar flow Regime (Re<≈3000). For flow regime, the relationship between the friction factor FD,Re and relative roughness εD is more complex.
6) It was plotted by Lewis Ferry Moody in the year 1944.