Computational Model for Water Hammer Disaster - Advances in Control and Automation of Water Systems - page 163

for water “UFW” as a water hammer effect was investigated for existent water trans-
mission line.

figure 9.4 Simulation of pipeline for Reclamation: (a) AC pipe-1,200 mm, (b) AC pipe-
1,200 mm replacement with PE pipe-1,200 mm.

Reclamation numerical modeling showed pressure decreasing became high and
high proportional to diameter increasing. It also showed pressure decreasing became
low and low proportional to diameter increasing. Max. Pressure drop happened when
diameter changed from smaller diameter to larger diameter and Min. Pressure decreas-
ing happened when diameter changed from larger diameter to smaller diameter. Pres-
sure rising became low and low proportional to diameter increasing. Max pressure
drop happened as long as diameter changed from small diameter to larger diameter and
Min pressure drop happened when diameter changed from large diameter to smaller
diameter. This was showed the numerical analysis modeling as a computational ap-
proach is computationally efficient for transient flow irreversibility prediction in a
practical case. It offered the lining method as a construction way for reclamation of
damaged water transmission line. The reason for offering of this variant for reclamation
was based on the lining of present reinforced concrete pipe with smaller diameter of
polyethylene pipe (AC pipe-1,200 mm must be

replaced by PE pipe-1,100 mm).