Dídia Covas

TL;DR: In this article, a new nouveau modele hydraulique (nomme HTS) was developed for calculating regimes transitoires hydrauliques des systemes de conduites pressurisees in polyethylene (PE).

TL;DR: In this article, a high-density polyethylene (pe) pipe-rig was used to collect pressure and circumferential strain data, and the pipe material presented a typical viscoelastic mechanical behaviour with a sudden pressure drop immediately after the fast valve closure, a major dissipation and dispersion of the pressure wave, and transient mechanical hysteresis.

TL;DR: In this paper, the standing wave difference method (SWDM) is applied to several configurations of pipe systems with different leak locations and sizes to identify the leak frequencies and estimate the approximate location.

TL;DR: Inverse transient analysis (ITA) as mentioned in this paper was used for the detection of leaks in polyethylene-based water pipe systems, where the transient is generated by a fast change of flow conditions, the leak has a reasonable size, and the transient solver is accurate enough to describe the transie.

TL;DR: In this paper, the authors focused on the analysis of hydraulic transients in polyvinyl chloride (PVC) pipes, which are characterized by a viscoelastic rheological behavior.