عنوان مقاله [English]
Leakage in fluid pipelines that is often observed in oil industry could be simulated easily in a steady condition by applying some assumptions. At steady condition, any sort of pressure drops in pipelines could be a reason for leakage presence. Since operations in pipelines is usually happens in an unsteady condition, In the present research, the flow in pipelines has been assumed as unsteady, for which the steady flow will be considered as its special case. In order to solve the adapted equations by methods of specifications, at first two algorithms called tile and time-machine will be investigated. And because of reinforcing noises and error establishment in leakage detection, in tile algorithm, a method similar to time-machine algorithm will be used. Then an algorithm specified for PLD model will be presented to determine an unsteady flow simulation, leakage detection, leakage physical situation, and eventually the calculation of the extent of the loss. The obtained results of this model will be compared with the practical ones.