2020-03-262020-03-262018Urban Water Journal; Vol. 15, Núm. 4; pp. 346-3521573062Xhttps://hdl.handle.net/20.500.12585/8885An air pocket’s behaviour inside of a pipeline during transient conditions is of great importance due to its effect on the safety of the hydraulic system and the complexity of modeling its behaviour. The emptying process from water pipelines needs more assessment because the generation of troughs of subatmospheric pressure may lead to serious damage. This research studies the air pocket parameters during an emptying process from a water pipeline. A well-equipped experimental facility was used to measure the pressure and the velocity change throughout the water emptying for different air pocket sizes and valve opening times. The phenomenon was simulated using a one-dimensional (1D) developed model based on the rigid formulation with a non-variable friction factor and a constant pipe diameter. The mathematical model shows good ability in predicting the trough of subatmospheric pressure value as the most important parameter which can affect the safety of hydraulic systems. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.Recurso electrónicoapplication/pdfenghttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/article10.1080/1573062X.2018.1475578Air pocketAir-waterPipelines emptyingSubatmospheric pressureTransient flowWater distribution systemsAir-water interactionAtmospheric pressureComplexityDistribution systemHydraulicsMathematical analysisNumerical modelOne-dimensional modelingPipelineTransient flowinfo:eu-repo/semantics/restrictedAccessAtribución-NoComercial 4.0 InternacionalUniversidad Tecnológica de BolívarRepositorio UTB57193337460560742827005720542020235568240000