Question

how to find the friction factor by using only experimental data, not the theoretical.

Mann Tahoma 11 Al Paste B I U abe X, X A- Aa-A Font 21 Paragraph Clipboard 2 RESULT 2.1 Experiment 1: Smooth Pipe Test section: Smooth pipe Test section diameter: 0.0254m Area="de = 5.067x10-4m Water temperature : 27°C Density at 27°C: 996.59 kg/m3 Dynamic viscosity at 27°C: 0.8509x10-3 Pas

Answer 1

SOLUTION.

To find friction factor using experimental Given data.

Given =

Pipe is smooth with diameter =0.0254 m

Rho =density=996.59 kg/m³

u = viscosity =0.008509 Pa.s

Lets find Raynolds number for each case by using the formula

Nre = D*V*rho/u

Where V is the velocity of fluid .

Aftr getting velocity we will calculate the friction factor by using blasius relationship which given as for turbulent flow

f = 0.079/Nre^0.25 for Nre > 4000

For laminar flow we have the relationship for f

f = 64 /Nre ..... For Nre < 2000

Flow rate,Q , m³/sec	velocity,V ,m/s	Nre=D*V*rho/V	flow condition	friction factor, f = 0.079/(Nre^0.25)
1.4	0.767	22817	turbulent	6.427*10^-3
1.2	0.658	19575	turbulent	6.679*10^-3
1	0.548	16301	turbulent	6.99*10^-3

Hence Given Answer are matches nearly to the theoretical Answer.

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