Water Hammer Analysis using a Hybrid Scheme
Keywords:
Hybrid scheme, implicit finite−difference method, IFDM, Method of Characteristics, MOC, pipe network, water hammerAbstract
Water hammer is analyzed using an original hybrid scheme that solves the transient flow by applying the Method of the Characteristics (MOC) on those pipes with a Courant number equal or approximately equal to 1.0, and the Implicit Finite−Difference Method (IFDM) on the pipes with Courant less than 1.0. The proposed algorithm allows solve the transient flow problem applying the best method (MOC or IFDM) in each system pipe depending on the Courant number assigned to it. By analyzing the transient flow in two pipe networks it is demonstrated that this solution-type allows obtain almost exact and/or conservative solutions without consuming too many resources such as computational memory and software execution time.
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