Improving the performance of water distribution systems’ simulation on multicore systems

Abstract

Hydraulic solvers for the simulation of flows and pressures in water distribution systems (WDS) are used extensively, and their computational performance is key when considering optimization problems. This paper presents an approach to speedup the hydraulic solver using OpenMP with two efficient methods for WDS simulation. The paper identifies the different tasks carried out in the simulation, showing their contribution to the execution time, and selecting the target tasks for parallelization. After describing the algorithms for the selected tasks, parallel OpenMP versions are derived, with emphasis on the task of linear system update. Results are presented for four different large WDS models, showing considerable reduction in computing time.

Efficient Modeling of Active Control Valves in Water Distribution Systems Using the Loop Method

“…An alternative algorithm is the looped Newton-Raphson method, initially presented by Epp and Fowler (1970), which considers a set of independent loops with an associated flow for each of them. The loop method has gained some attention lately, with different papers (Abraham and Stoianov 2016;Alvarruiz et al 2017a;Abraham and Stoianov 2015;Alvarruiz et al 2015;Creaco and Franchini 2014;Elhay et al 2014) showing that it can be a competitive alternative to GGA.…”