With the development of urban areas, many municipalities are facing issues where the flow
velocity in their sewer systems is relatively high at various locations. This is because of …

An energy-dissipation model is developed to simulate rapid filling having an entrapped air
pocket within a vertical pipe. Both convective heat transfer and transient wall shear stresses …

The risks associated with unsteady two-phase flows in pressurized pipe systems must be
considered both in system design and operation. To this end, this paper summarizes …

Supply interruptions are a common occurrence in water systems and are particularly
prevalent in developing countries. During the system filling, the air that entered into the …

The sizing of air valves during the air expulsion phase in rapid filling processes is crucial for
design purposes. Mathematical models have been developed to simulate the behaviour of …

The intermittent water supply (IWS) of water distribution systems is a common practice
caused by the imbalance between available water resources and customers' demands …

The estimation of thermodynamic behavior during filling processes with entrapped air in
water pipelines is a complex task as it requires solving a system of algebraic-differential …

This paper investigates the effects of an intermittent supply in a large branched set-up. The
general behavior of the filling phenomena is exemplified with reference to a typical test …

The fix-grid method of characteristic (MOC) has been the main numerical scheme for
modeling the transient pipe flows with an entrapped air pocket, where the Courant number C …

ABSTRACT A 3D computational fluid dynamics model based on a volume of fluid (VOF)
approach is presented to simulate air-water interactions and transient pressures in T …