Numerical and Theoretical Investigation to Estimate Darcy Friction Factor in Water Network Problem Based on Modified Chun-Hui He’s Algorithm and Applications

Table 1

The statistics values of flow, diameter, length, and constants value K displayed along with each value of the fraction factor f of each pipe in the network (Figure 2).

Pipes	No.		Assume flow (lt/s)	Assume flow (m^3/s)	Diameter (m)	Length (m)	K = 8 fL/gD^5п^2
A-B	1		q1 = 125	q1 = 0.125	0.457	120
B-C	2		q2 = 75	q2 = 0.075	0.457	150
C-D	3		q3 = 35	q3 = 0.035	0.457	150
D-G	4		q4 = 25	q4 = 0.025	0.406	160
G-J	5		q5 = 90	q5 = 0.090	0.457	120
J-I	6		q6 = 150	q6 = 0.150	0.609	300
I-H	7		q7 = 175	q7 = 0175	0.304	120
H-A	8		q8 = 175	q8 = 0175	0.304	280
B-E	9		q9 = 50	q9 = 0.050	0.406	160
C-F	10		q10 = 40	q10 = 0.040	0.406	16
E-F	11		q11 = 15	q11 = 0.015	0.406	16
F-G	12		q12 = 15	q12 = 0.015	0.406	16
E-I	13		q13 = 25	q13 = 0.025	0.355	14