Transient Energy Analysis in Water-Filled Viscoelastic Pipelines

The transient flow phenomenon in a pipeline accounts for the variations with time and space. energy analysis (TEA) overlooks process as it sums of entire pipe domain reports at each moment. current research takes advantage this approach to investigate different influential factors water pipelines, including steady friction, unsteady wall viscoelasticity, figure out conversion dissipation during process. To end, expressions are derived compared both elastic viscoelastic systems. Two materials—oriented polyvinyl chloride (PVC-O) high-density polyethylene (HDPE)—are applied compare proportions by factors. results reveal that small perturbations, influence friction is dominant dissipation, impact viscoelasticity grows excitation intensity valve’s oscillation frequency. Besides, spatial (per unit length) along have been investigated single branched systems, demonstrating significant deviations distance from source.