Author(s): Huan-Feng Duan; Yeou-Koung Tung; Mohamed S. Ghidaoui
Linked Author(s): Mohamed S. Ghidaoui
Keywords: Fluid transients; Pipe system; Uncertainty propagation; First-order second-moment; Monte-Carlo simulation
Abstract: In the analysis of fluid transients in a practical pipe system, the parameters are usually subject to variations which induce uncertainty in the outputs/responses from numerical models during surge wave oscillations. This paper investigates the effects of input variations on the uncertainty propagations of pressure waves under waterhammer conditions in different pipe system configurations, including single pipe, series pipes, and networks. In addition, the effect of duration of valve motions on suppressing the uncertainty propagations of system responses is also studied. The one-dimensional (1D) waterhammer model and two uncertainty analysis tools, the first-order second-moment (FOSM) method and MonteCarlo simulation (MCS) method, are adopted in this investigation.