Numerical investigation of rapid filling in bypass pipelines

The rapid filling behaviour of a bypass pipeline is analysed numerically using an elastic model combined with the polytropic law for the air phase. These explorations show that the system can be readily filled when the entrapped air in the bypass line could be released into the atmospheric air, but that large pressure surges are predicted due to the collision of the filling fronts coming from the opposite ends of the bypass line. As expected, …