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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water engineering : Explicit central finite difference methods for fluid-structure interaction in
Explicit central finite difference methods for fluid-structure interaction in
Author : FAEZE KHALIGHI(1), ALIREZA KERAMAT(2) & AHMAD AHMADI(3)
interaction (FSI) occurs when the dynamic water hammer forces; cause vibrations in the pipe wall. FSI in
pipe systems being Poisson and junction coupling occurring due to water hammer has been the center of attention in
recent years. It causes fluctuations in pressure heads and vibrations in the pipe wall. The governing equations of this
phenomenon include a system of first order hyperbolic partial differential equations (PDEs) in terms of hydraulic and
structural quantities.
In the present paper, a two-step variant of the Lax-Friedrichs (LXF) method, and a method based on the Nessyahu-
Tadmor (NT) are used to simulate FSI in a reservoir-pipe-valve system. The computational results are compared with
those of the Method of Characteristics (MOC), and also with the results of Godunov's scheme to verify the proposed
numerical solution. The results reveal that the proposed LXF and NT schemes can predict discontinuous in fluid pressure
with an acceptable order of accuracy. The independency of time and space steps allows for setting different spatial grid
size with a unique time step, thus increasing the accuracy with respect to the conventional MOC.Form Required :
File Size : 419,750 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water engineering
Date Published : 19/08/2015
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