What is Fanning friction factor used for?
The Fanning friction factor is an element in the calculation of pressure loss due to friction in a pipe. It is a function of the roughness of the pipe and the level of turbulence within the liquid flow. These factors can be determined experimentally but are more often taken from charts and diagrams.
What is Fanning friction factor formula?
f = Friction factor (4 × f ′ in Fanning equation) ρ = Fluid density, lb/cu. ft. d = Tube internal diameter, in.
What is Fanning friction factor for laminar flow in pipe?
Most charts or tables indicate the type of friction factor, or at least provide the formula for the friction factor with laminar flow. If the formula for laminar flow is f = 16Re, it is the Fanning factor f, and if the formula for laminar flow is fD = 64Re, it is the Darcy–Weisbach factor fD.
How do you find the Darcy friction factor?
The Darcy friction factor is four times the Fanning friction factor, fF, i.e., fD = 4fF.
What is apparent friction factor?
An apparent friction coefficient is equal to the friction coefficient under the condition that 1) the friction coefficient is constant during moving, 2) the kinetic energy of debris avalanche is lost only by friction and 3) the pathway is the minimum path. …
What is the friction factor in pipes?
The friction factor or Moody chart is the plot of the relative roughness (e/D) of a pipe against the Reynold’s number. The blue lines plot the friction factor for flow in the wholly turbulent region of the chart, while the straight black line plots the friction factor for flow in the wholly laminar region of the chart.
What is the friction factor in a pipe?
1. Definition of friction factor. The friction factor is representing the loss of pressure of a fluid in a pipe due to the interactions in between the fluid and the pipe.
Why does friction factor increase with diameter?
The results show that as the Reynolds number of the capsule increases, the friction factor due to solid phase alone decreases. Furthermore, as the capsule to pipe diameter ratio increases, the friction factor due to solid phase in the flow increases.
Does Reynolds number increase with diameter?
The greater the diameter of the channel is, the greater the Reynolds value will be, and the smaller the friction factor value.