Water Hammer Simulation Method in Pressurized Pipeline with a Moving Isolation Device

Smart isolation devices (SIDs) are commonly used in pressurized subsea pipelines that need to be maintained or repaired. The sudden stoppage of the SID may cause large water hammer pressures, which threaten both pipeline and SID. This paper proposes a simulation method by using coupled dynamic mesh technique simulate pressures pipeline. Unlike other simulations, this is first with moving object. implicit applied model since it has mutual independence between space step time step. movement achieved updating size computational meshes close at each To improve efficiency ability handling complex boundary conditions, pipe sections far away from can also simulated explicit Method Characteristics (MOC). Verifications were conducted results Computational Fluid Dynamics (CFD) numerical simulation. Two scenarios have been studied comparisons 1D methods those CFD show high correlation, thus validating new proposed paper.